[QE-users] epsilon.x

Fariba Islam ezqhaz at gmail.com
Fri Apr 10 19:32:07 CEST 2020


Dear altruists,

I did epsilon.x calculation for Si and did not obtain the desired
dielectric constant. What did I do wrong?
My scf and nscf files were as follows-
scf-

&control
    calculation = 'scf'
    restart_mode='from_scratch'
    prefix = 'si_b'
    outdir='./tmp/'
    pseudo_dir='../pseudo/'
/
&system
    ibrav=2, celldm(1) =10.410909236,
    nat=2, ntyp=1,
    ecutwfc=40
    ecutrho=320
    nbnd=8
    ! occupations='smearing', smearing='gaussian',degauss=0.005
/
&electrons
    conv_thr=1e-8
/
ATOMIC_SPECIES
 Si  28.0855  Si_ONCV_PBE_FR-1.1.upf

ATOMIC_POSITIONS (alat)
 Si 0.00 0.00 0.00
 Si 0.25 0.25 0.25
K_POINTS {crystal}
  5
  0.0000 0.5000 0.0000 1 !L
  0.0000 0.0000 0.0000 1 !Gamma
  -0.500 0.0000 -0.500 1 !X
  -0.375 0.2500 -0.375 1 !U
  0.0000 0.0000 0.0000 1 !Gamma



nscf-&control
    calculation = 'nscf'
    restart_mode='from_scratch'
    prefix = 'si_b'
    outdir='./tmp/'
    pseudo_dir='../pseudo/'
/
&system
    ibrav=2, celldm(1) =10.410909236,
    nat=2, ntyp=1,
    ecutwfc=40
    ecutrho=320
    occupations='smearing' , smearing='gaussian',degauss=0.005
    nbnd=8
    nosym = .TRUE.
/
&electrons
    conv_thr=1e-8
/
ATOMIC_SPECIES
 Si  28.0855  Si_ONCV_PBE_FR-1.1.upf

ATOMIC_POSITIONS (alat)
 Si 0.00 0.00 0.00
 Si 0.25 0.25 0.25
K_POINTS {crystal}
  5
  0.0000 0.5000 0.0000 1 !L
  0.0000 0.0000 0.0000 1 !Gamma
  -0.500 0.0000 -0.500 1 !X
  -0.375 0.2500 -0.375 1 !U
  0.0000 0.0000 0.0000 1 !Gamma



For the real part of dielectric constant, I have got this following data-

# energy grid [eV]     epsr_x  epsr_y  epsr_z
#
    0.001000000   90.300340984  105.584120531  105.584127842
    0.051081803   90.336268893  105.623533493  105.623540805
    0.101163606   90.441464912  105.738926008  105.738933324
    0.151245409   90.616435960  105.930831526  105.930838850
    0.201327212   90.862029415  106.200141597  106.200148931
    0.251409015   91.179443597  106.548116651  106.548123998
    0.301490818   91.570242769  106.976401397  106.976408761
    0.351572621   92.036376989  107.487045214  107.487052598
    0.401654424   92.580207317  108.082528015  108.082535421
    0.451736227   93.204536987  108.765792219  108.765799650
    0.501818030   93.912649340  109.540281638  109.540289098
    0.551899833   94.708353531  110.409988293  110.409995784
    0.601981636   95.596039228  111.379508401  111.379515926
    0.652063439   96.580741879  112.454109119  112.454116682
    0.702145242   97.668220444  113.639807979  113.639815582
    0.752227045   98.865050010  114.943467425  114.943475072
    0.802308848  100.178732266  116.372907495  116.372915189
    0.852390651  101.617827605  117.937040411  117.937048155
    0.902472454  103.192113577  119.646031872  119.646039669
    0.952554257  104.912775706  121.511495076  121.511502929
    1.002636060  106.792638327  123.546725211  123.546733122
    1.052717863  108.846445301  125.766984308  125.766992281
    1.102799666  111.091203369  128.189849307  128.189857344
    1.152881469  113.546604823  130.835640092  130.835648195
    1.202963272  116.235551486  133.727949585  133.727957756
    1.253045075  119.184809264  136.894305293  136.894313533
    1.303126878  122.425832663  140.367001834  140.367010143
    1.353208681  125.995812850  144.184158191  144.184166569
    1.403290484  129.939023052  148.391073709  148.391082154
    1.453372287  134.308564296  153.041986061  153.041994571
    1.503454090  139.168657261  158.202377267  158.202385835
    1.553535893  144.597689770  163.952037655  163.952046275
    1.603617696  150.692326200  170.389194488  170.389203146
    1.653699499  157.573134607  177.636161576  177.636170257
    1.703781302  165.392423422  185.847202432  185.847211110
    1.753863105  174.345360550  195.219680594  195.219689238
    1.803944908  184.686077292  206.010200607  206.010209169
    1.854026711  196.751526257  218.558510095  218.558518511
    1.904108514  210.997716394  233.323787715  233.323795893
    1.954190317  228.056248306  250.941242228  250.941250040
    2.004272120  248.825053230  272.312928749  272.312936006
    2.054353923  274.618068857  298.757518800  298.757525228
    2.104435726  307.417057975  332.262234632  332.262239821
    2.154517529  350.291297973  375.902681779  375.902685099
    2.204599332  408.011109726  434.456556164  434.456556637
    2.254681135  487.224718091  514.580728426  514.580724571
    2.304762938  589.814040448  618.167315586  618.167305716
    2.354844741  648.121567409  677.570919471  677.570906520
    2.404926544  279.067001401  309.725714419  309.725728579
    2.455008347 -294.443023475 -262.444146874 -262.444082512
    2.505090150 -444.250957161 -410.759749832 -410.759652087
    2.555171953 -374.025998739 -338.864091708 -338.863988321
    2.605253756 -271.858826625 -234.815273419 -234.815169864
    2.655335559 -186.131520306 -146.954356730 -146.954248603
    2.705417362 -112.889922744  -71.274852572  -71.274733711
    2.755499165  -43.956031650    0.469015247    0.469152123
    2.805580968   21.050235668   68.746597540   68.746756697
    2.855662771   23.235548248   74.784389388   74.784532343
    2.905744574 -201.741252191 -145.594420941 -145.594447477
    2.955826377 -327.628114452 -265.906564834 -265.906689928
    3.005908180 -293.801865105 -225.195097721 -225.195209156
    3.055989983 -247.227432683 -169.928588004 -169.928675434
    3.106071786 -210.661254557 -122.103240313 -122.103309404
    3.156153589 -182.936150164  -79.364676632  -79.364732447
    3.206235392 -161.413077834  -37.270737793  -37.270783701
    3.256317195 -144.205615207    8.081343477    8.081305310
    3.306398998 -130.081406618   53.666624962   53.666592834
    3.356480801 -118.227282474   43.333598942   43.333568917
    3.406562604 -108.090008110 -121.998230702 -121.998265386
    3.456644407  -99.280176595 -247.584710921 -247.584742425
    3.506726210  -91.514423619 -264.107971167 -264.107997516
    3.556808013  -84.579799076 -228.442845599 -228.442869204
    3.606889816  -78.311006023 -194.653780592 -194.653802228
    3.656971619  -72.575221103 -168.597681183 -168.597701202
    3.707053422  -67.261400107 -148.417228814 -148.417247466
    3.757135225  -62.272143083 -132.267014854 -132.267032342
    3.807217028  -57.516781956 -118.888721257 -118.888737753
    3.857298831  -52.904566972 -107.441376590 -107.441392244
    3.907380634  -48.336726920  -97.335801016  -97.335815964
    3.957462437  -43.695703162  -88.124548274  -88.124562646
    4.007544240  -38.828832928  -79.426450302  -79.426464230
    4.057626043  -33.522010947  -70.864780261  -70.864793888
    4.107707846  -27.457452497  -62.003185701  -62.003199198
    4.157789649  -20.160232648  -52.278424874  -52.278438458
    4.207871452  -11.054197807  -41.047308926  -41.047322876
    4.257953255   -0.729245926  -28.848003781  -28.848018298
    4.308035058   -1.422785882  -27.877413990  -27.877427798
    4.358116861  -52.630016587  -77.598625769  -77.598632848
    4.408198664  -87.725817117 -111.360744348 -111.360746679
    4.458280467  -82.327759739 -104.760498090 -104.760500565
    4.508362270  -72.558843759  -93.903919485  -93.903922658
    4.558444073  -64.757518702  -85.115565645  -85.115569309
    4.608525876  -58.821841935  -78.282112855  -78.282116812
    4.658607679  -54.185092159  -72.827561299  -72.827565418
    4.708689482  -50.435955186  -68.333141367  -68.333145563
    4.758771285  -47.308756773  -64.527385892  -64.527390110
    4.808853088  -44.630823117  -61.233455232  -61.233459436
    4.858934891  -42.285942192  -58.332718478  -58.332722644
    4.909016694  -40.192146425  -55.742879246  -55.742883357
    4.959098497  -38.288022598  -53.404983502  -53.404987548
    5.009180301  -36.523560549  -51.275548580  -51.275552554
    5.059262104  -34.853116705  -49.321658926  -49.321662824
    5.109343907  -33.229871360  -47.517819381  -47.517823200
    5.159425710  -31.610196825  -45.843878477  -45.843882217
    5.209507513  -30.047888650  -44.283621519  -44.283625178
    5.259589316  -29.398247658  -42.823794209  -42.823797788
    5.309671119  -31.317989318  -41.453410002  -41.453413502
    5.359752922  -31.630699177  -40.163248783  -40.163252206
    5.409834725  -30.427285142  -38.945487303  -38.945490650
    5.459916528  -29.177098172  -37.793422148  -37.793425420
    5.509998331  -28.071329218  -36.701258850  -36.701262050
    5.560080134  -27.089810854  -35.663949084  -35.663952214
    5.610161937  -26.202342690  -34.677063338  -34.677066398
    5.660243740  -25.387394356  -33.736690126  -33.736693119
    5.710325543  -24.630483479  -32.839355342  -32.839358271
    5.760407346  -23.921636120  -31.981957057  -31.981959922
    5.810489149  -23.253707610  -31.161712299  -31.161715103
    5.860570952  -22.621372967  -30.376113244  -30.376115989
    5.910652755  -22.020519266  -29.622890846  -29.622893532
    5.960734558  -21.447870497  -28.899984410  -28.899987040
    6.010816361  -20.900748431  -28.205515971  -28.205518547
    6.060898164  -20.376915123  -27.537768552  -27.537771076
    6.110979967  -19.874465898  -26.895167615  -26.895170087
    6.161061770  -19.391754465  -26.276265127  -26.276267549
    6.211143573  -18.927339099  -25.679725800  -25.679728174
    6.261225376  -18.479942963  -25.104315142  -25.104317469
    6.311307179  -18.048424198  -24.548889016  -24.548891298
    6.361388982  -17.631752873  -24.012384476  -24.012386714
    6.411470785  -17.228992871  -23.493811667  -23.493813863
    6.461552588  -16.839287376  -22.992246637  -22.992248791
    6.511634391  -16.461847031  -22.506824902  -22.506827015
    6.561716194  -16.095940096  -22.036735660  -22.036737734
    6.611797997  -15.740884113  -21.581216536  -21.581218572
    6.661879800  -15.396038710  -21.139548769  -21.139550768
    6.711961603  -15.060799251  -20.711052760  -20.711054723
    6.762043406  -14.734591103  -20.295083887  -20.295085815
    6.812125209  -14.416864326  -19.891028529  -19.891030423
    6.862207012  -14.107088614  -19.498300193  -19.498302054
    6.912288815  -13.804748316  -19.116335679  -19.116337507
    6.962370618  -13.509337383  -18.744591165  -18.744592962
    7.012452421  -13.220354054  -18.382538110  -18.382539877
    7.062534224  -12.937295084  -18.029658813  -18.029660550
    7.112616027  -12.659649253  -17.685441453  -17.685443161
    7.162697830  -12.386889861  -17.349374346  -17.349376026
    7.212779633  -12.118465781  -17.020939094  -17.020940746
    7.262861436  -11.853790539  -16.699602135  -16.699603761
    7.312943239  -11.592228660  -16.384804027  -16.384805627
    7.363025042  -11.333078237  -16.075945468  -16.075947044
    7.413106845  -11.075548229  -15.772368609  -15.772370160
    7.463188648  -10.818728310  -15.473331401  -15.473332928
    7.513270451  -10.561548083  -15.177971562  -15.177973066
    7.563352254  -10.302720786  -14.885254648  -14.885256130
    7.613434057  -10.040664051  -14.593897310  -14.593898771
    7.663515860   -9.773385915  -14.302250784  -14.302252224
    7.713597663   -9.498317062  -14.008118951  -14.008120372
    7.763679466   -9.212057716  -13.708465875  -13.708467277
    7.813761269   -8.909985440  -13.398932380  -13.398933765
    7.863843072   -8.585630038  -13.073020649  -13.073022017
    7.913924875   -8.229648765  -12.720729395  -12.720730750
    7.964006678   -7.828106034  -12.326531293  -12.326532636
    8.014088481   -7.359570172  -11.868567797  -11.868569131
    8.064170284   -6.790519993  -11.338379030  -11.338380361
    8.114252087   -6.070863550  -10.939513268  -10.939514589
    8.164333890   -5.153248141  -11.988160562  -11.988161810
    8.214415693   -4.241268404  -13.999535675  -13.999536803
    8.264497496   -5.456558094  -14.006903623  -14.006904725
    8.314579299  -11.315640948  -13.495650354  -13.495651454
    8.364661102  -13.024080821  -13.030823659  -13.030824755
    8.414742905  -12.172187352  -12.647637518  -12.647638607
    8.464824708  -11.243780572  -12.324439361  -12.324440441
    8.514906511  -10.515739599  -12.042663661  -12.042664730
    8.564988314   -9.945769212  -11.790148585  -11.790149643
    8.615070117   -9.481551707  -11.559100908  -11.559101954
    8.665151920   -9.087081666  -11.344414746  -11.344415780
    8.715233723   -8.738571180  -11.142637402  -11.142638423
    8.765315526   -8.419489124  -10.951357871  -10.951358880
    8.815397329   -8.117167328  -10.768841064  -10.768842060
    8.865479132   -7.820417359  -10.593803415  -10.593804399
    8.915560935   -7.517501520  -10.425271284  -10.425272256
    8.965642738   -7.194071310  -10.262489087  -10.262490046
    9.015724541   -6.832190774  -10.104858136  -10.104859082
    9.065806344   -6.423672694   -9.951894932   -9.951895866
    9.115888147   -6.106757825   -9.803202097   -9.803203020
    9.165969950   -6.776616418   -9.658447707   -9.658448619
    9.216051753   -8.063295196   -9.517350314   -9.517351214
    9.266133556   -7.983737988   -9.379667913   -9.379668801
    9.316215359   -7.541250395   -9.245189671   -9.245190548
    9.366297162   -7.098399254   -9.113729634   -9.113730499
    9.416378965   -6.662655208   -8.985121854   -8.985122708
    9.466460768   -6.223799850   -8.859216557   -8.859217400
    9.516542571   -6.001614780   -8.735877075   -8.735877907
    9.566624374   -7.019666970   -8.614977332   -8.614978153
    9.616706177   -8.065773828   -8.496399739   -8.496400550
    9.666787980   -7.895295164   -8.380033372   -8.380034171
    9.716869783   -7.540739965   -8.265772330   -8.265773119
    9.766951586   -7.237538752   -8.153514203   -8.153514982
    9.817033389   -6.989700880   -8.043158538   -8.043159307
    9.867115192   -6.781348425   -7.934605243   -7.934606001
    9.917196995   -6.600365551   -7.827752792   -7.827753539
    9.967278798   -6.438816350   -7.722496117   -7.722496854
   10.017360601   -6.291499816   -7.618723984   -7.618724711
   10.067442404   -6.154894497   -7.516315577   -7.516316293
   10.117524207   -6.026514718   -7.415135870   -7.415136579
   10.167606010   -5.904522560   -7.315029133   -7.315029835
   10.217687813   -5.787485877   -7.215809501   -7.215810194
   10.267769616   -5.674217420   -7.117246852   -7.117247534
   10.317851419   -5.563656258   -7.019044929   -7.019045600
   10.367933222   -5.454765375   -6.920806409   -6.920807069
   10.418015025   -5.346423239   -6.821975437   -6.821976086
   10.468096828   -5.237284158   -6.721741086   -6.721741724
   10.518178631   -5.125575549   -6.618876908   -6.618877534
   10.568260434   -5.008817402   -6.511509145   -6.511509760
   10.618342237   -4.883713854   -6.397073190   -6.397073791
   10.668424040   -4.748783449   -6.275040087   -6.275040674
   10.718505843   -4.630470053   -6.173180959   -6.173181532
   10.768587646   -4.684896939   -6.249576485   -6.249577058
   10.818669449   -4.800353104   -6.395527684   -6.395528261
   10.868751252   -4.682270893   -6.321148777   -6.321149340
   10.918833055   -4.496563166   -6.198826421   -6.198826965
   10.968914858   -4.294803095   -6.081203367   -6.081203891
   11.018996661   -4.152781554   -5.970066582   -5.970067083
   11.069078464   -4.498995606   -5.861780946   -5.861781420
   11.119160267   -5.072526069   -5.752558151   -5.752558593
   11.169242070   -5.034598938   -5.638315515   -5.638315918
   11.219323873   -4.860179420   -5.513945309   -5.513945659
   11.269405676   -4.703485713   -5.373555515   -5.373555794
   11.319487479   -4.572216122   -5.221257466   -5.221257660
   11.369569282   -4.459246336   -5.163087228   -5.163087435
   11.419651085   -4.358704566   -5.572455263   -5.572455969
   11.469732888   -4.266707979   -5.868182595   -5.868183681
   11.519814691   -4.180705319   -5.767928486   -5.767929543
   11.569896494   -4.098955622   -5.620105579   -5.620106560
   11.619978297   -4.020205779   -5.489431421   -5.489432347
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   24.140429048   -0.123912242   -0.400038249   -0.400038390
   24.190510851   -0.119142229   -0.394129439   -0.394129579
   24.240592654   -0.114402921   -0.388258314   -0.388258453
   24.290674457   -0.109694050   -0.382424549   -0.382424688
   24.340756260   -0.105015350   -0.376627825   -0.376627963
   24.390838063   -0.100366559   -0.370867825   -0.370867962
   24.440919866   -0.095747419   -0.365144234   -0.365144370
   24.491001669   -0.091157674   -0.359456742   -0.359456878
   24.541083472   -0.086597069   -0.353805043   -0.353805178
   24.591165275   -0.082065356   -0.348188833   -0.348188968
   24.641247078   -0.077562285   -0.342607812   -0.342607947
   24.691328881   -0.073087612   -0.337061683   -0.337061817
   24.741410684   -0.068641094   -0.331550153   -0.331550286
   24.791492487   -0.064222492   -0.326072929   -0.326073062
   24.841574290   -0.059831568   -0.320629725   -0.320629857
   24.891656093   -0.055468089   -0.315220257   -0.315220388
   24.941737896   -0.051131821   -0.309844242   -0.309844373
   24.991819699   -0.046822536   -0.304501403   -0.304501534
   25.041901503   -0.042540007   -0.299191464   -0.299191594
   25.091983306   -0.038284008   -0.293914151   -0.293914281
   25.142065109   -0.034054318   -0.288669196   -0.288669325
   25.192146912   -0.029850718   -0.283456332   -0.283456460
   25.242228715   -0.025672988   -0.278275293   -0.278275421
   25.292310518   -0.021520915   -0.273125820   -0.273125947
   25.342392321   -0.017394286   -0.268007652   -0.268007778
   25.392474124   -0.013292889   -0.262920534   -0.262920660
   25.442555927   -0.009216517   -0.257864214   -0.257864339
   25.492637730   -0.005164963   -0.252838439   -0.252838564
   25.542719533   -0.001138023   -0.247842962   -0.247843086
   25.592801336    0.002864505   -0.242877537   -0.242877661
   25.642883139    0.006842820   -0.237941922   -0.237942045
   25.692964942    0.010797120   -0.233035875   -0.233035998
   25.743046745    0.014727601   -0.228159159   -0.228159281
   25.793128548    0.018634456   -0.223311538   -0.223311660
   25.843210351    0.022517878   -0.218492778   -0.218492899
   25.893292154    0.026378055   -0.213702649   -0.213702770
   25.943373957    0.030215175   -0.208940922   -0.208941042
   25.993455760    0.034029425   -0.204207370   -0.204207490
   26.043537563    0.037820988   -0.199501771   -0.199501890
   26.093619366    0.041590046   -0.194823901   -0.194824020
   26.143701169    0.045336779   -0.190173542   -0.190173660
   26.193782972    0.049061365   -0.185550476   -0.185550594
   26.243864775    0.052763982   -0.180954488   -0.180954606
   26.293946578    0.056444803   -0.176385365   -0.176385482
   26.344028381    0.060104001   -0.171842897   -0.171843013
   26.394110184    0.063741749   -0.167326873   -0.167326989
   26.444191987    0.067358214   -0.162837088   -0.162837204
   26.494273790    0.070953566   -0.158373337   -0.158373452
   26.544355593    0.074527970   -0.153935417   -0.153935532
   26.594437396    0.078081590   -0.149523128   -0.149523242
   26.644519199    0.081614590   -0.145136270   -0.145136384
   26.694601002    0.085127130   -0.140774648   -0.140774761
   26.744682805    0.088619370   -0.136438066   -0.136438178
   26.794764608    0.092091469   -0.132126331   -0.132126443
   26.844846411    0.095543582   -0.127839252   -0.127839364
   26.894928214    0.098975864   -0.123576640   -0.123576751
   26.945010017    0.102388469   -0.119338308   -0.119338419
   26.995091820    0.105781549   -0.115124069   -0.115124180
   27.045173623    0.109155254   -0.110933741   -0.110933851
   27.095255426    0.112509733   -0.106767141   -0.106767251
   27.145337229    0.115845134   -0.102624089   -0.102624199
   27.195419032    0.119161602   -0.098504407   -0.098504516
   27.245500835    0.122459283   -0.094407917   -0.094408025
   27.295582638    0.125738318   -0.090334444   -0.090334552
   27.345664441    0.128998851   -0.086283816   -0.086283923
   27.395746244    0.132241022   -0.082255859   -0.082255966
   27.445828047    0.135464970   -0.078250404   -0.078250511
   27.495909850    0.138670832   -0.074267283   -0.074267390
   27.545991653    0.141858745   -0.070306328   -0.070306434
   27.596073456    0.145028845   -0.066367374   -0.066367480
   27.646155259    0.148181264   -0.062450257   -0.062450363
   27.696237062    0.151316137   -0.058554815   -0.058554920
   27.746318865    0.154433594   -0.054680887   -0.054680991
   27.796400668    0.157533764   -0.050828313   -0.050828417
   27.846482471    0.160616778   -0.046996936   -0.046997040
   27.896564274    0.163682763   -0.043186600   -0.043186703
   27.946646077    0.166731845   -0.039397149   -0.039397252
   27.996727880    0.169764150   -0.035628430   -0.035628533
   28.046809683    0.172779801   -0.031880291   -0.031880393
   28.096891486    0.175778921   -0.028152582   -0.028152684
   28.146973289    0.178761633   -0.024445153   -0.024445254
   28.197055092    0.181728057   -0.020757856   -0.020757957
   28.247136895    0.184678313   -0.017090545   -0.017090645
   28.297218698    0.187612518   -0.013443074   -0.013443174
   28.347300501    0.190530791   -0.009815300   -0.009815400
   28.397382304    0.193433247   -0.006207081   -0.006207180
   28.447464107    0.196320002   -0.002618274   -0.002618374
   28.497545910    0.199191170    0.000951259    0.000951160
   28.547627713    0.202046864    0.004501658    0.004501560
   28.597709516    0.204887195    0.008033060    0.008032962
   28.647791319    0.207712276    0.011545602    0.011545504
   28.697873122    0.210522215    0.015039418    0.015039320
   28.747954925    0.213317123    0.018514641    0.018514544
   28.798036728    0.216097106    0.021971405    0.021971309
   28.848118531    0.218862272    0.025409841    0.025409745
   28.898200334    0.221612728    0.028830079    0.028829983
   28.948282137    0.224348577    0.032232248    0.032232153
   28.998363940    0.227069925    0.035616476    0.035616381
   29.048445743    0.229776874    0.038982889    0.038982794
   29.098527546    0.232469527    0.042331614    0.042331519
   29.148609349    0.235147985    0.045662774    0.045662680
   29.198691152    0.237812348    0.048976494    0.048976400
   29.248772955    0.240462717    0.052272894    0.052272801
   29.298854758    0.243099190    0.055552098    0.055552004
   29.348936561    0.245721864    0.058814223    0.058814131
   29.399018364    0.248330837    0.062059391    0.062059299
   29.449100167    0.250926204    0.065287719    0.065287627
   29.499181970    0.253508061    0.068499323    0.068499231
   29.549263773    0.256076503    0.071694321    0.071694229
   29.599345576    0.258631622    0.074872826    0.074872735
   29.649427379    0.261173512    0.078034953    0.078034862
   29.699509182    0.263702264    0.081180814    0.081180724
   29.749590985    0.266217970    0.084310523    0.084310433
   29.799672788    0.268720720    0.087424189    0.087424099
   29.849754591    0.271210603    0.090521924    0.090521834
   29.899836394    0.273687708    0.093603835    0.093603746
   29.949918197    0.276152123    0.096670032    0.096669943
   30.000000000    0.278603936    0.099720621    0.099720532

Regards



On Fri, Apr 10, 2020 at 12:36 PM Paolo Giannozzi <p.giannozzi at gmail.com>
wrote:

> True for "IEEE_DENORMAL" and  "IEEE_UNDERFLOW" , but "IEEE_DIVIDE_BY_ZERO"
> is a  serious error and should never be present
>
> Paolo
>
> On Fri, Apr 10, 2020 at 3:09 AM Andrea Ferretti <
> andrea.ferretti at nano.cnr.it> wrote:
>
>>
>>
>> Dear Fariba,
>>
>> this kind of warnings (which are not errors) are not unusual and
>> very often harmless.
>> Apparently, Fortran 2003 or 2008 standard is requiring them to be printed
>> out when a stop call is issued (and some denormal numbers have been
>> generated by the code).
>>
>> see eg:
>> https://github.com/firemodels/fds/issues/5638
>>
>> Andrea
>>
>> > Dear Nicola,Thank you so much for your help. But scf and nscf
>> calculation shows the following message in the terminal -
>> > Note: The following floating-point exceptions are signalling:
>> IEEE_DIVIDE_BY_ZERO
>> > What to do with this?
>> >
>> > On Tue, Apr 7, 2020 at 10:04 PM Nicola Marzari <nicola.marzari at epfl.ch>
>> wrote:
>> >       On 07/04/2020 17:57, Fariba Islam wrote:
>> >       > I am using the pp Si.pbe-n-kjpaw_psl.1.0.0.UPF whose pp type is
>> PAW
>> >       > still I am receiving the previous error-
>> >       > task #         0
>> >       >       from grid_build : error #         1
>> >       >       USPP are not implemented
>> >
>> >
>> >       PAW is as complex as USPP, so the error message above comprises
>> both cases.
>> >
>> >       > And another question is where can I get norm-conserving pp?
>> >
>> >       We have tested the Schlipf Gygi, that you can find here:
>> >       http://www.quantum-simulation.org/potentials/sg15_oncv/
>> >
>> >       The tests are in
>> >       https://www.materialscloud.org/discover/sssp/plot/efficiency/Si
>> >
>> >
>> >                               nicola
>> >
>> >
>> >       >
>> >       > On Tue, Apr 7, 2020 at 9:45 PM Fariba Islam <ezqhaz at gmail.com
>> >       > <mailto:ezqhaz at gmail.com>> wrote:
>> >       >
>> >       >        I am sorry I misunderstood the error, I thought it said
>> I need to
>> >       >     use USPP. But it said otherwise.
>> >       >     Thanks for your help.
>> >       >
>> >       >     On Tue, Apr 7, 2020 at 9:38 PM Nicola Marzari
>> >       >     <nicola.marzari at epfl.ch <mailto:nicola.marzari at epfl.ch>>
>> wrote:
>> >       >
>> >       >         On 07/04/2020 17:32, Fariba Islam wrote:
>> >       >          > I have used USPP Si.rel-pbe-nl-rrkjus_psl.1.0.0.UPF
>> >       >          >
>> >       >         <
>> https://www.quantum-espresso.org/upf_files/Si.rel-pbe-nl-rrkjus_psl.1.0.0.UPF
>> > to
>> >       >
>> >       >          > run scf and nscf for silicon. But when I run the
>> epsilon.x
>> >       >         the program
>> >       >          > crashes with the following error-
>> >       >          > task #         0
>> >       >          >       from grid_build : error #         1
>> >       >          >       USPP are not implemented
>> >       >
>> >       >         What is the problem, in your opinion?
>> >       >
>> >       >                                  nicola
>> >       >
>> >       >
>> >       >
>>  ----------------------------------------------------------------------
>> >       >         Prof Nicola Marzari, Chair of Theory and Simulation of
>> >       >         Materials, EPFL
>> >       >         Director, National Centre for Competence in Research
>> NCCR
>> >       >         MARVEL, EPFL
>> >       >         http://theossrv1.epfl.ch/Main/Contact
>> >       >         http://nccr-marvel.ch/en/project
>> >       >
>> >
>> >
>> >       --
>> >
>>  ----------------------------------------------------------------------
>> >       Prof Nicola Marzari, Chair of Theory and Simulation of Materials,
>> EPFL
>> >       Director, National Centre for Competence in Research NCCR MARVEL,
>> EPFL
>> >       http://theossrv1.epfl.ch/Main/Contact
>> http://nccr-marvel.ch/en/project
>> >
>> >
>> >
>>
>> --
>> Andrea Ferretti, PhD
>> S3 Center, Istituto Nanoscienze, CNR
>> via Campi 213/A, 41125, Modena, Italy
>> Tel: +39 059 2055322;  Skype: andrea_ferretti
>> URL: http://www.nano.cnr.it
>> _______________________________________________
>> Quantum ESPRESSO is supported by MaX (www.max-centre.eu/quantum-espresso)
>> users mailing list users at lists.quantum-espresso.org
>> https://lists.quantum-espresso.org/mailman/listinfo/users
>
>
>
> --
> Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,
> Univ. Udine, via delle Scienze 208, 33100 Udine, Italy
> Phone +39-0432-558216, fax +39-0432-558222
>
>
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