[Pw_forum] Fourier interpolation

[HaoPan]

Hi, everyone,



On each q point I got, the phone frequencies are positive. But after the Fourier interpolation process, There

exist negative frequencies. I check the some special q points using ph.x, there are no negative frequencies. I

know the dynamical matrices for metal are not smooth function of q, but how do I fix it to get the right

dispersion curves? Thanks a lot.



Sincerely,

Pan Hao

Tulane University 		 	   		  
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