PHYSICAL REVIEW B

ZHANG HG, SUN JT, LOW T, ZHANG LZ, PAN Y, LIU Q, MAO JH, ZHOU HT, GUO HM, DU SX, GUINEA F, GAO HJ

APPLIED PHYSICS LETTERS

GAO M, PAN Y, HUANG L, HU H, ZHANG LZ, GUO HM, DU SX, GAO HJ