Tilt-Induced Anisotropic to Isotropic Phase Transition at $ν= 5-2$ - Condensed Matter > Strongly Correlated ElectronsReportar como inadecuado




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Abstract: A modest in-plane magnetic field \Bpar\ is sufficient to destroy thefractional quantized Hall states at $ u = 5-2$ and 7-2 and replace them withanisotropic compressible phases. Remarkably, we find that at larger \Bpar\these anisotropic phases can themselves be replaced by isotropic compressiblephases reminiscent of the composite fermion fluid at $ u = 1-2$. We presentstrong evidence that this transition is a consequence of the mixing of Landaulevels from different electric subbands. We also report surprising dependencesof the energy gaps at $ u = 5-2$ and 7-3 on the width of the confinementpotential.



Autor: Jing Xia, Vaclav Cvicek, J.P. Eisenstein, L.N. Pfeiffer, K.W. West

Fuente: https://arxiv.org/



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