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P { margin-bottom: 0.21cm } --> Dear Siesta users,
I am currently calculating the vibration frequencies of one molecule on a
Cu(111) surface using SIESTA and Vibra codes. I have just one broad question. I was wondering if there is a way to impose the acoustic sum rule (i.e. impose the three acoustic modes to be equal to 0) in SIESTA ? Regards, François Varchon UCL/IMCN/NAPS, Louvain-la-neuve, Belgium
