[Pw_forum] Mean Square Displacement (MSD) of atoms

2011-01-19 Thread Bertrand SITAMTZE
Dear Giovanni thanks for your help. I will try it before I get you back. Thanks once again --- En date de?: Mar 18.1.11, Giovanni La Penna a ?crit?: De: Giovanni La Penna Objet: Re: [Pw_forum] Mean Square Displacement (MSD) of atoms ?: "PWSCF Forum" Date: Mardi 18 janvier 2

[Pw_forum] Mean Square Displacement (MSD) of atoms

2011-01-18 Thread Giovanni La Penna
> > How to remove the artificial > translation when processing the coordinates? > > If boxc[] = a,b,c of an orthorhombic cell and the origin is in 0,0,0 a piece of the C code for storing the variables to be correlated in a molecular liquid at time t is: for(k=0;k<3;k++) { boxcm[

[Pw_forum] Mean Square Displacement (MSD) of atoms

2011-01-18 Thread Changru Ma
one file to build the total MSD for all ions. Is this correct? > > Thank once again for your help > > > > Bertrand SITAMTZE YOUMBI, PhD > Laboratory of Material Sciences > University of Yaounde I-Cameroon > ********* > > --- E

[Pw_forum] Mean Square Displacement (MSD) of atoms

2011-01-18 Thread Bertrand SITAMTZE
Dear Giovanni Thanks for your reply. How to remove the artificial translation when processing the coordinates? Thanks once again. --- En date de?: Mar 18.1.11, Giovanni La Penna a ?crit?: De: Giovanni La Penna Objet: Re: [Pw_forum] Mean Square Displacement (MSD) of atoms ?: "PWSCF

[Pw_forum] Mean Square Displacement (MSD) of atoms

2011-01-18 Thread Giovanni La Penna
Just a warning when adapting a code for msqd calculation. Maybe it is well known, but repetita iuvant. The *.pos trajectory files can be processed directly because the atoms are free to exit the cell. In the case of animated xsf files (those produced by cppp and visible for graphical manipulation

[Pw_forum] Mean Square Displacement (MSD) of atoms

2011-01-18 Thread Bertrand SITAMTZE
ZE YOUMBI, PhD Laboratory of Material Sciences University of Yaounde I-Cameroon * --- En date de?: Lun 17.1.11, Changru Ma a ?crit?: De: Changru Ma Objet: Re: [Pw_forum] Mean Square Displacement (MSD) of atoms ?: "PWSCF Forum" Date: Lundi 17 janvier 2011,

[Pw_forum] Mean Square Displacement (MSD) of atoms

2011-01-17 Thread Changru Ma
Dear Bertrand, Positions of each ions during the dynamics will be written in $outdir/prefix.pos every iprint steps. They are sorted by specie, and converted to real a.u. coordinates. You have to write a code yourself to calculate the MSD. Understanding molecular simulation: from algorithms to

[Pw_forum] Mean Square Displacement (MSD) of atoms

2011-01-17 Thread Bertrand SITAMTZE
Dear all, I have performed ab-initio Molecular Dynamics within the CP code and I would like to collect the MSD of each ions during the dynamics. Please could somebody tell me how to proceed from QE output? Thanks very much for your answers Bertrand SITAMTZE YOU