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

ACTA PHYSICA SINICA

WANG WR, ZHOU YX, LI T, WANG YL, XIE XM