Thermoelectric response of fractional quantized Hall and reentrant insulating states in the N=1 Landau level

Article

关键词: 2-DIMENSIONAL ELECTRON LIQUID;    WEAK MAGNETIC-FIELD;    CHARGE-DENSITY-WAVE;    FLUCTUATIONS;    TRANSPORT;    THERMOPOWER;    GAS;   

DOI  :  10.1103/PhysRevB.87.075302

来源: SCIE

【 摘 要 】

Detailed measurements of the longitudinal thermopower of two-dimensional electrons in the first excited Landau level are reported. Clear signatures of numerous fractional quantized Hall states, including those at v = 5/2 and 7/3, are observed in the magnetic field and temperature dependence of the thermopower. An abrupt collapse of the thermopower is observed below about T = 40 mK at those filling factors where reentrant insulating electronic states have been observed in conventional resistive transport studies. The thermopower observed at v = 5/2 is discussed in the context of recent theories which incorporate non-Abelian quasiparticle exchange statistics. DOI: 10.1103/PhysRevB.87.075302

【 授权许可】

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