[Pw_forum] MD with manual velocities and printing of updated velocities

2015-10-19 Thread Venkataramana Imandi
Dear QE users, I checked entire manual and keywords list of pw.x, there is nowhere information about manual entering of atomic velocities in the input file, If necessary sometimes. Moreover, I have seen dynamics_module.f90 file, it is shown that velocities are initialized from Maxwell-Boltzmann di

[Pw_forum] SCF Calculation

2015-10-19 Thread Mofrad, Amir Mehdi (MU-Student)
Dear all users, Can anyone tell me what the least needed parameters to do scf calculations in quantum espresso are? I would really appreciate it. Thank you, Amir ___ Pw_forum mailing list Pw_forum@pwscf.org http://pwscf.org/mailman/listinfo/pw_foru

[Pw_forum] imaginary frequency at extended Q point

2015-10-19 Thread ??????????
Dear all, I used nq1 = 2, nq2 = 2, nq3 = 2 and nq1 = 4, nq2 = 4, nq3 = 4 ,respectively, to do a phonon calculation. There is no imaginary frequency at the calculated Q points, but after calculations of Q2R and MATDYN, imaginary frequencies appear near GAMMA point(not GAMMA point). My setting

Re: [Pw_forum] imaginary frequency at extended Q point

2015-10-19 Thread Sridhar Sadasivam
Try reducing the tr2_ph parameter. 1D-11 is too high. I have had similar problems in the past and it was solved by reducing tr2_ph. I would suggest trying 1D-13 or 1D-14. -Sridhar Purdue University On Mon, Oct 19, 2015 at 9:36 PM, 潭影空人心 <774729...@qq.com> wrote: > Dear all, >I used nq1 = 2, n

[Pw_forum] command line for pwo2xsf.sh

2015-10-19 Thread Jaret Qi
Dear QE users,What command line should I use to run pwo2xsf.sh?I tried this but not success:pwo2xsf.sh --animxsf|-a file.out sc.out  Best,JaretASU___ Pw_forum mailing list Pw_forum@pwscf.org http://pwscf.org/mailman/listinfo/pw_forum

Re: [Pw_forum] command line for pwo2xsf.sh

2015-10-19 Thread Paolo Giannozzi
On Tue, Oct 20, 2015 at 7:44 AM, Jaret Qi wrote: pwo2xsf.sh --animxsf|-a file.out sc.out > pwo2xsf.sh -a file.out > sc.out or pwo2xsf.sh --animxsf file.out > sc.out P. -- Paolo Giannozzi, Dept. Chemistry&Physics&Environment, Univ. Udine, via delle Scienze 208, 33100 Udine, Italy Phone +39-0432

[Pw_forum] DFT+U with static homogeneous finite electric field or Uniaxial tensile strain

2015-10-19 Thread Yusuf Zuntu
Dear developers, Thank you for your continues help. I want to know if DFT+U with static homogeneous finite electric field or Uniaxial tensile strain have been implemented in any of the QE version. If so, please guide me to any tutorial or examples links where such calculations have been perform

Re: [Pw_forum] command line for pwo2xsf.sh

2015-10-19 Thread Jaret Qi
I tried both but got this error:(standard_in) 1: syntax error/home/bin/pwo2xsf.sh: line 92: test: -eq: unary operator expected On Tuesday, October 20, 2015 12:12 AM, Paolo Giannozzi wrote: On Tue, Oct 20, 2015 at 7:44 AM, Jaret Qi wrote: pwo2xsf.sh --animxsf|-a file.out sc.out

Re: [Pw_forum] MD with manual velocities and printing of updated velocities

2015-10-19 Thread Paolo Giannozzi
Currently it is not possible to provide atomic velocities from input in pw.x. It can be done with the Car-Parrinello code. Velocities are not used in the Verlet algorithm implemented in pw.x. They have to be computed from positions as (x(t+dt)-x(t-dt))/(2dt) Paolo On Mon, Oct 19, 2015 at 6:16 PM