PHYSICAL REVIEW LETTERS

WANG SY, TAN LZ, WANG WH, LOUIE SG, LIN NA

PHYSICAL REVIEW LETTERS

BAI KK, ZHOU Y, ZHENG H, MENG L, PENG HL, LIU ZF, NIE JC, HE L

PHYSICAL REVIEW LETTERS

MA CX, SUN HF, ZHAO YL, LI B, LI QX, ZHAO AD, WANG XP, LUO Y, YANG JL, WANG B, HOU JG

PHYSICAL REVIEW LETTERS

QIAO ZH, REN W, CHEN H, BELLAICHE L, ZHANG ZY, MACDONALD AH, NIU Q

PHYSICAL REVIEW LETTERS

ZHANG DB, SEIFERT G, CHANG K