[Pw_forum] Energy calculation for single carbon atom

2011-02-09 Thread Changru Ma
Hi Tram, Please have a look at the User's Guide first: http://www.quantum-espresso.org/user_guide/node50.html#SECTION0001110240 Best wishes, Changru > Hi Everyone, > I'm trying to run the total energy calculation for a simple cubic of > carbon, in which i'm using the lattice co

[Pw_forum] Energy calculation for single carbon atom

2011-02-09 Thread Duy Le
for isolated atom, you need to perform spin-polarized DFT, and also you need to fix occupation number by using Hund's rule(use occupations card). -- Duy Le PhD Student Department of Physics University of Central Florida. "Men don't need hand to do th

[Pw_forum] Energy calculation for single carbon atom

2011-02-09 Thread Tram Bui
Hi Everyone, I'm trying to run the total energy calculation for a simple cubic of carbon, in which i'm using the lattice constant of 40 Bohrs (a.u) and the E cut off of 30 Ryd. this should be a very simple calculation. when I used K-points of 10x10x10, the calculation worked fine. However, I