Evidence of two-stage melting of Wigner solids

Article

关键词: METAL-INSULATOR-TRANSITION;    CHARGE-DENSITY-WAVE;    MAGNETIC-FIELD;    2 DIMENSIONS;    2-DIMENSIONAL SYSTEMS;    ELECTRON-SYSTEM;    PHASE;    CONDUCTIVITY;    DYNAMICS;    GAAS;   

DOI  :  10.1103/PhysRevB.97.085135

来源: SCIE

【 摘 要 】

Ultralow carrier concentrations of two-dimensional holes down to p = 1 x 10(9) cm(-2) are realized. Remarkable insulating states are found below a critical density of p(c) = 4 x 10(9) cm(-2) or r(s) approximate to 40. Sensitive dc V-I measurement as a function of temperature and electric field reveals a two-stage phase transition supporting the melting of a Wigner solid as a two-stage first-order transition.

【 授权许可】

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