JOURNAL OF PHYSICSCONDENSED MATTER

MENG L, WU RT, ZHANG LZ, LI LF, DU SX, WANG YL, GAO HJ

APPLIED PHYSICS LETTERS

MAO JH, HUANG L, PAN Y, GAO M, HE JF, ZHOU HT, GUO HM, TIAN Y, ZOU Q, ZHANG LZ, ZHANG HG, WANG YL, DU SX, ZHOU XJ, CASTRO NETO AH, GAO HJ