PHYSICAL REVIEW B, vol. 80, no. 7, page. 73104, 2009-08
PHYSICAL REVIEW B, vol. 80, no. 3, 2009-07
PHYSICAL REVIEW LETTERS, vol. 102, no. 25, page. 256404, 2009-06-26
JOURNAL OF APPLIED PHYSICS, vol. 105, no. 7, 2009-04-01
PHYSICAL REVIEW LETTERS, vol. 102, no. 7, 2009-02-20