Institution: | (1) Departamento de Física, Centro de Investigación y de Estudios Avanzados del IPN, A.P. 14-740, 07000 México D.F., Mexico;(2) Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA;(3) Supercomputing Research Department, Supercomputing Center, Korea Institute of Science and Technology Information, Yusong-Gu, Eoeun-Dong 52, Daejon, 305-806, Korea |