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Published February 15, 2013 | Published + Submitted
Journal Article Open

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

Abstract

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 ν=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 ν=5/2 is discussed in the context of recent theories which incorporate non-Abelian quasiparticle exchange statistics.

Additional Information

© 2013 American Physical Society. Received 15 November 2012; published 4 February 2013. This work was supported via DOE Grant No. DE-FG03-99ER45766 and Microsoft Project Q.

Attached Files

Published - PhysRevB.87.075302.pdf

Submitted - 1211.3672v1.pdf

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August 19, 2023
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