APPLIED PHYSICS LETTERS

LEE X, YANG TT, LI X, ZHANG RJ, ZHU M, ZHANG HZ, XIE D, WEI JQ, ZHONG ML, WANG KL, WU DH, LI ZH, ZHU HW

APPLIED PHYSICS LETTERS

SUN PZ, ZHU M, WANG KL, ZHONG ML, WEI JQ, WU DH, CHENG Y, ZHU HW