Abstract
We investigate nonequilibrium transport in the reentrant integer quantum Hall phases of the second Landau level. At high currents, we observe a transition from the reentrant integer quantum Hall phases to classical Hall conduction. Surprisingly, this transition is markedly different for the hole- and electron sides of each spin branch. While the hole bubble phases exhibit a sharp transition to an isotropic compressible phase, the transition for the electron side occurs via an intermediate phase. This might indicate a more complex structure of the bubble phases than currently anticipated, or a breaking of the particle-hole symmetry. Such a symmetry breaking in the second Landau level might also have consequences for the physics at filling factor .
- Received 15 December 2014
- Revised 20 April 2015
DOI:https://doi.org/10.1103/PhysRevB.91.195414
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