APPLIED PHYSICS LETTERS

QUE YD, XIAO WD, FEI XM, CHEN H, HUANG L, DU SX, GAO HJ

APPLIED PHYSICS LETTERS

ZOU Q, BELLE BD, ZHANG LZ, XIAO WD, YANG K, LIU LW, WANG GQ, FEI XM, HUANG Y, MA RS, LU Y, TAN PH, GUO HM, DU SX, GAO HJ