Strong transport anisotropy in Ge/SiGe quantum wells in tilted magnetic fields

Article

关键词: 2-DIMENSIONAL ELECTRON LIQUID;    CHARGE-DENSITY-WAVE;    STATE;    MAGNETORESISTANCE;    PHASE;   

DOI  :  10.1103/PhysRevB.91.201301

来源: SCIE

【 摘 要 】

We report on strong transport anisotropy in a two-dimensional hole gas in a Ge/SiGe quantum well, which emerges only when both perpendicular and in-plane magnetic fields are present. The ratio of resistances, measured along and perpendicular to the in-plane field, can exceed 3 x 10(4). The anisotropy occurs in a wide range of filling factors where it is determined primarily by the tilt angle. The lack of significant anisotropy without an in-plane field, easy tunability, and persistence to higher temperatures and filling factors set this anisotropy apart from nematic phases in GaAs/AlGaAs.

【 授权许可】

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