<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br></div><br><div><div>On Mar 10, 2010, at 6:07 PM, naphtaly moro wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Dear Re: Ngoc Linh Nguyen, Giovanni Cantele & Sebastijan Peljhan<br><br>I am working on the various phases of GaAs. at normal conditions, GaAs<br>assumes a Zincblende structures fcc ibrav=2, as pressure increases it<br>assumes Rocksalt structure and then assumes a CsCl structure which is<br>bcc ibrav=3 that is why my input as i posted it. Can you advice me<br>further?<br>Regards<br></div></blockquote><div><br></div>This is possible, but as I explained, your positions are wrong. Indeed, the atom in 000</div><div>will be periodically replicated according to the bcc lattice sites. That means that you have</div><div>a Ga atom in 0.5 0.5 0.5 too.</div><div>If you specify the As position as 0.5 0.5 0.5 that will be overlapped to the Ga atom end no </div><div>code will know what to do.</div><div><br></div><div>Therefore, you should understand after the fcc -> bcc transition what changes to the basis</div><div>occur, namely the "new" atomic positions in the bcc lattice unit cell.</div><div><br></div><div>Giovanni</div><div><br></div><div><br></div><div><br></div><div><blockquote type="cite"><div><br><br><blockquote type="cite"><font class="Apple-style-span" color="#144FAE"><br></font></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">------------------------------<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Message: 2<br></blockquote><blockquote type="cite">Date: Wed, 10 Mar 2010 11:44:52 +0300<br></blockquote><blockquote type="cite">From: naphtaly moro <<a href="mailto:moronaphtaly84@gmail.com">moronaphtaly84@gmail.com</a>><br></blockquote><blockquote type="cite">Subject: [Pw_forum] QE & Xcrysden<br></blockquote><blockquote type="cite">To: <a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a><br></blockquote><blockquote type="cite">Message-ID:<br></blockquote><blockquote type="cite"><span class="Apple-tab-span" style="white-space:pre"> </span><<a href="mailto:fe3b32711003100044t31b012aen17eacad01974f4ee@mail.gmail.com">fe3b32711003100044t31b012aen17eacad01974f4ee@mail.gmail.com</a>><br></blockquote><blockquote type="cite">Content-Type: text/plain; charset=ISO-8859-1<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Dear Q.E. & Xcrysden<br></blockquote><blockquote type="cite">I am working on the various phase transitions of GaAs. I am trying to<br></blockquote><blockquote type="cite">contact these structures. I ahve managed to construct the ZB and RS<br></blockquote><blockquote type="cite">structures with success. I am using Xcrysden with Quantum Espresso.<br></blockquote><blockquote type="cite">When i try to view the CsCl-GaAs structure, I only see the Ga atoms<br></blockquote><blockquote type="cite">and with no As atoms in the matrix. Can someone show me please where I<br></blockquote><blockquote type="cite">am going wrong<br></blockquote><blockquote type="cite"> my input file is this<br></blockquote><blockquote type="cite"> &control<br></blockquote><blockquote type="cite"> prefix='GaAs',<br></blockquote><blockquote type="cite"> pseudo_dir='/home/physics/Desktop/espresso-4.0.5/pseudo'<br></blockquote><blockquote type="cite"> outdir = './tmp',<br></blockquote><blockquote type="cite"> /<br></blockquote><blockquote type="cite"> &system<br></blockquote><blockquote type="cite"> ibrav= 3, celldm(1) =10.2, nat= 2, ntyp= 2,<br></blockquote><blockquote type="cite"> ecutwfc = 12.0,<br></blockquote><blockquote type="cite"> /<br></blockquote><blockquote type="cite"> &electrons<br></blockquote><blockquote type="cite"> /<br></blockquote><blockquote type="cite">ATOMIC_SPECIES<br></blockquote><blockquote type="cite"> Ga 69.723 Ga.pbe-nsp-van.UPF<br></blockquote><blockquote type="cite"> As 74.9216 As.pbe-n-van.UPF<br></blockquote><blockquote type="cite">ATOMIC_POSITIONS<br></blockquote><blockquote type="cite"> Ga 0.00 0.00 0.00<br></blockquote><blockquote type="cite"> As 0.50 0.50 0.50<br></blockquote><blockquote type="cite">K_POINTS {automatic}<br></blockquote><blockquote type="cite"> 4 4 4 0 0 0<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Thanks<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">--<br></blockquote><blockquote type="cite">Cecil Naphtaly Moro<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">------------------------------<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Message: 3<br></blockquote><blockquote type="cite">Date: Wed, 10 Mar 2010 10:07:19 +0100<br></blockquote><blockquote type="cite">From: Ngoc Linh Nguyen <<a href="mailto:nnlinh@sissa.it">nnlinh@sissa.it</a>><br></blockquote><blockquote type="cite">Subject: Re: [Pw_forum] QE & Xcrysden<br></blockquote><blockquote type="cite">To: PWSCF Forum <<a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a>><br></blockquote><blockquote type="cite">Message-ID: <<a href="mailto:4B976147.6060104@sissa.it">4B976147.6060104@sissa.it</a>><br></blockquote><blockquote type="cite">Content-Type: text/plain; charset=us-ascii; format=flowed<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">naphtaly moro wrote:<br></blockquote><blockquote type="cite"><blockquote type="cite">Dear Q.E. & Xcrysden<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">I am working on the various phase transitions of GaAs. I am trying to<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">contact these structures. I ahve managed to construct the ZB and RS<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">structures with success. I am using Xcrysden with Quantum Espresso.<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">When i try to view the CsCl-GaAs structure, I only see the Ga atoms<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">and with no As atoms in the matrix. Can someone show me please where I<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">am going wrong<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> my input file is this<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> &control<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> prefix='GaAs',<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> pseudo_dir='/home/physics/Desktop/espresso-4.0.5/pseudo'<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> outdir = './tmp',<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> /<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> &system<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> ibrav= 3, celldm(1) =10.2, nat= 2, ntyp= 2,<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> ecutwfc = 12.0,<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> /<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> &electrons<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> /<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">ATOMIC_SPECIES<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> Ga 69.723 Ga.pbe-nsp-van.UPF<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> As 74.9216 As.pbe-n-van.UPF<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">ATOMIC_POSITIONS<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> Ga 0.00 0.00 0.00<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> As 0.50 0.50 0.50<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">K_POINTS {automatic}<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> 4 4 4 0 0 0<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite">You are having a wrong input structure. Namely, you chose ibrav= 3 which<br></blockquote><blockquote type="cite">means BCC lattice, so in a periodic lattice the As atoms will be<br></blockquote><blockquote type="cite">overlapped by Ga atoms.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">How to fix the problem. You should again pick up another ibrav value and<br></blockquote><blockquote type="cite">calculate the Gs and As positions.<br></blockquote><blockquote type="cite">As far as I know, GaAs lattice have a similarity to diamond lattice, so<br></blockquote><blockquote type="cite">I suggest ibrav=2, and<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Ga 0.00 0.00 0.00<br></blockquote><blockquote type="cite">As 0.25 0.25 0.25<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Good luck<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Linh<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><blockquote type="cite">Thanks<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">--<br></blockquote><blockquote type="cite">-----------------------------------------------------<br></blockquote><blockquote type="cite"> Nguyen Ngoc Linh, PhD Student<br></blockquote><blockquote type="cite"> c/o: SISSA & CNR-INFM Democritos,<br></blockquote><blockquote type="cite"> via Beirut 2-4, 34014 Trieste (Italy)<br></blockquote><blockquote type="cite"> email: <a href="mailto:nnlinh@sissa.it">nnlinh@sissa.it</a><br></blockquote><blockquote type="cite"> phone: +39 04 03787 319<br></blockquote><blockquote type="cite"> skype: ngoclinh84phys<br></blockquote><blockquote type="cite">-----------------------------------------------------<br></blockquote><blockquote type="cite">"The physics is theoretical but the fun is real"<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">------------------------------<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Message: 4<br></blockquote><blockquote type="cite">Date: Wed, 10 Mar 2010 10:12:03 +0100<br></blockquote><blockquote type="cite">From: Giovanni Cantele <<a href="mailto:giovanni.cantele@na.infn.it">giovanni.cantele@na.infn.it</a>><br></blockquote><blockquote type="cite">Subject: Re: [Pw_forum] QE & Xcrysden<br></blockquote><blockquote type="cite">To: PWSCF Forum <<a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a>><br></blockquote><blockquote type="cite">Message-ID: <<a href="mailto:A01EC0FD-0226-4351-A0A6-040071AACB82@na.infn.it">A01EC0FD-0226-4351-A0A6-040071AACB82@na.infn.it</a>><br></blockquote><blockquote type="cite">Content-Type: text/plain; charset=us-ascii<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">On Mar 10, 2010, at 9:44 AM, naphtaly moro wrote:<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><blockquote type="cite">Dear Q.E. & Xcrysden<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">I am working on the various phase transitions of GaAs. I am trying to<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">contact these structures. I ahve managed to construct the ZB and RS<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">structures with success. I am using Xcrysden with Quantum Espresso.<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">When i try to view the CsCl-GaAs structure, I only see the Ga atoms<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">and with no As atoms in the matrix. Can someone show me please where I<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">am going wrong<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">my input file is this<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">&control<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> prefix='GaAs',<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> pseudo_dir='/home/physics/Desktop/espresso-4.0.5/pseudo'<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> outdir = './tmp',<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">/<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">&system<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> ibrav= 3, celldm(1) =10.2, nat= 2, ntyp= 2,<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> ecutwfc = 12.0,<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">/<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">&electrons<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">/<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">ATOMIC_SPECIES<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Ga 69.723 Ga.pbe-nsp-van.UPF<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">As 74.9216 As.pbe-n-van.UPF<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">ATOMIC_POSITIONS<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Ga 0.00 0.00 0.00<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">As 0.50 0.50 0.50<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">K_POINTS {automatic}<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">4 4 4 0 0 0<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Thanks<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">--<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Cecil Naphtaly Moro<br></blockquote></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">The reason is that you specify ibrav = 3 that, according to what explained<br></blockquote><blockquote type="cite">in Doc/INPUT_PW.txt is a bcc lattice.<br></blockquote><blockquote type="cite">At the same time you give the ATOMIC_POSITIONS in units of the alat (namely,<br></blockquote><blockquote type="cite">a in bohr units).<br></blockquote><blockquote type="cite">Therefore, the As atom is placed at (a/2, a/2, a/2) which is, by chance (!),<br></blockquote><blockquote type="cite">also a site of the bcc lattice.<br></blockquote><blockquote type="cite">In other words, what XCrysDen sees is a Ga atom in a/2,a/2,a/2 but ALSO an<br></blockquote><blockquote type="cite">As atom at the same place and decides<br></blockquote><blockquote type="cite">to delete the latter.<br></blockquote><blockquote type="cite">Maybe you want to specify the fcc lattice (ibrav=2) and the As atom at<br></blockquote><blockquote type="cite">a/4,a/4,a/4.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Giovanni<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">PS not very sure that ecutwfc = 12.0 whould give you converged results.<br></blockquote><blockquote type="cite">Also, because you choosed<br></blockquote><blockquote type="cite">ultrasoft pseudopotentials, you might want also check the ecutrho parameter<br></blockquote><blockquote type="cite">(by default = 4 * ecutwfc,<br></blockquote><blockquote type="cite">but larger values are needed when using US pseudo).<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">--<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Giovanni Cantele, PhD<br></blockquote><blockquote type="cite">CNR-SPIN and Dipartimento di Scienze Fisiche<br></blockquote><blockquote type="cite">Universita' di Napoli "Federico II"<br></blockquote><blockquote type="cite">Complesso Universitario M. S. Angelo - Ed. 6<br></blockquote><blockquote type="cite">Via Cintia, I-80126, Napoli, Italy<br></blockquote><blockquote type="cite">Phone: +39 081 676910 - Fax: +39 081 676346<br></blockquote><blockquote type="cite">Skype contact: giocan74<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">ResearcherID: <a href="http://www.researcherid.com/rid/A-1951-2009">http://www.researcherid.com/rid/A-1951-2009</a><br></blockquote><blockquote type="cite">Web page: <a href="http://people.na.infn.it/~cantele">http://people.na.infn.it/~cantele</a><br></blockquote><blockquote type="cite"> <a href="http://www.nanomat.unina.it">http://www.nanomat.unina.it</a><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">------------------------------<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Message: 5<br></blockquote><blockquote type="cite">Date: Wed, 10 Mar 2010 10:22:31 +0100<br></blockquote><blockquote type="cite">From: Sebastijan Peljhan <<a href="mailto:sebastijan.peljhan@ijs.si">sebastijan.peljhan@ijs.si</a>><br></blockquote><blockquote type="cite">Subject: Re: [Pw_forum] QE & Xcrysden<br></blockquote><blockquote type="cite">To: PWSCF Forum <<a href="mailto:pw_forum@pwscf.org">pw_forum@pwscf.org</a>><br></blockquote><blockquote type="cite">Message-ID: <1268212951.2427.22.camel@surf><br></blockquote><blockquote type="cite">Content-Type: text/plain; charset="UTF-8"<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Dear Cecil,<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">On Wed, 2010-03-10 at 11:44 +0300, naphtaly moro wrote:<br></blockquote><blockquote type="cite"><blockquote type="cite">Dear Q.E. & Xcrysden<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">I am working on the various phase transitions of GaAs. I am trying to<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">contact these structures. I ahve managed to construct the ZB and RS<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">structures with success. I am using Xcrysden with Quantum Espresso.<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">When i try to view the CsCl-GaAs structure, I only see the Ga atoms<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">and with no As atoms in the matrix. Can someone show me please where I<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">am going wrong<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> my input file is this<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> &control<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> prefix='GaAs',<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> pseudo_dir='/home/physics/Desktop/espresso-4.0.5/pseudo'<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> outdir = './tmp',<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> /<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> &system<br></blockquote></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">ibrav = 3 represents bcc cubic cell, hence the Ga and As atoms in your<br></blockquote><blockquote type="cite">structure overlap. Xcrysden actually warns you, that some of the atoms<br></blockquote><blockquote type="cite">overlap and they will be deleted.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">According to QE example06 you should try with ibrav = 2 (fcc) and As<br></blockquote><blockquote type="cite">atom at (0.25 0.25 0.25) position.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Cheers,<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">Sebastijan<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite"><blockquote type="cite"> ibrav= 3, celldm(1) =10.2, nat= 2, ntyp= 2,<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> ecutwfc = 12.0,<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> /<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> &electrons<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> /<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">ATOMIC_SPECIES<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> Ga 69.723 Ga.pbe-nsp-van.UPF<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> As 74.9216 As.pbe-n-van.UPF<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">ATOMIC_POSITIONS<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> Ga 0.00 0.00 0.00<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> As 0.50 0.50 0.50<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">K_POINTS {automatic}<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"> 4 4 4 0 0 0<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite">Thanks<br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><blockquote type="cite"><br></blockquote></blockquote><blockquote type="cite"><br></blockquote></div></blockquote></div><div><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div><br class="Apple-interchange-newline"><br></div><div><br></div><div>--</div><div><br></div><div><div>Giovanni Cantele, PhD</div><div>CNR-SPIN and Dipartimento di Scienze Fisiche</div><div>Universita' di Napoli "Federico II"</div><div>Complesso Universitario M. S. Angelo - Ed. 6</div><div>Via Cintia, I-80126, Napoli, Italy</div><div>Phone: +39 081 676910 - Fax: +39 081 676346</div><div>Skype contact: giocan74</div><div><br></div><div>ResearcherID: <a href="http://www.researcherid.com/rid/A-1951-2009">http://www.researcherid.com/rid/A-1951-2009</a></div><div>Web page: <a href="http://people.na.infn.it/~cantele">http://people.na.infn.it/~cantele</a></div><div> <a href="http://www.nanomat.unina.it">http://www.nanomat.unina.it</a></div></div></span></div></span></span>
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