[Pw_forum] Low energy phonon modes

Sanjeev Gupta physics.skgupta at gmail.com
Wed Jun 29 21:54:44 CEST 2011

Dear PWSCF user,

I would like to know weather PWSCF can calculate low energy phonon modes
(call it acoustic phonons) for semiconductor nanostructure system like
Silicon (size nearly 5 nm). If we see Raman spectra then some of low
frequency mode in the range of 5- 50 cm-1. These modes are important in

How one can proceed to calculate?

Thanks in advance.

Best Regards

Dr. Sanjeev K Gupta
Dept. of Physics,
Bhavnagar University
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