Particle-hole asymmetry of fractional quantum Hall states in the second Landau level of a two-dimensional hole system
Date of this Version
5-13-2011Citation
A. Kumar, N. Samkharadze, G. A. Csáthy, M. J. Manfra, L. N. Pfeiffer, and K. W. West Phys. Rev. B 83, 201305(R). 13 May 2011
Abstract
We report the unambiguous observation of a fractional quantum Hall state in the Landau level of a two-dimensional-hole sample at the filling factor v = 8/3. We identified this state by a quantized Hall resistance and an activated temperature dependence of the longitudinal resistance and found an energy gap of 40 mK. Notably, the particle-hole conjugate state at filling factor v = 7/3 in our sample did not develop down to 6.9 mK. This observation is contrary to that in electron samples, in which the 7/3 state is typically more stable than the 8/3 state. We present evidence that the asymmetry between the 7/3 and 8/3 states in our hole sample is due to Landau-level mixing.
Discipline(s)
Nanoscience and Nanotechnology
Comments
This is the published version of A. Kumar, N. Samkharadze, G. A. Csáthy, M. J. Manfra, L. N. Pfeiffer, and K. W. West. 13 May 2011. "Particle-hole asymmetry of fractional quantum Hall states in the second Landau level of a two-dimensional hole system". First published in the Physical Review B and is available online at: https://doi.org/10.1103/PhysRevB.83.201305.