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】
Free