Intrinsic Gap of the nu=5/2 Fractional Quantum Hall State

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dc.creatorDean, C. R.
dc.creatorPiot, B. A.
dc.creatorHayden, P.
dc.creatorSarma, S. Das
dc.creatorGervais, G.
dc.creatorPfeiffer, L. N.
dc.creatorWest, K. W.
dc.date2008-01-22
dc.date2008-01-30
dc.date.accessioned2026-07-07T09:31:13Z
dc.date.available2026-07-07T09:31:13Z
dc.descriptionThe fractional quantum Hall effect is observed at low field, in a regime where the cyclotron energy is smaller than the Coulomb interaction. The nu=5/2 excitation gap is measured to be 262+/-15 mK at ~2.6 T, in good agreement with previous measurements performed on samples with similar mobility, but with electronic density larger by a factor of two. The role of disorder on the nu=5/2 gap is examined. Comparison between experiment and theory indicates that a large discrepancy remains for the intrinsic gap extrapolated from the infinite mobility (zero disorder) limit. In contrast, no such large discrepancy is found for the nu=1/3 Laughlin state. The observation of the nu=5/2 state in the low-field regime implies that inclusion of non-perturbative Landau level mixing may be necessary to better understand the energetics of half-filled fractional quantum hall liquids.
dc.description5 pages, 4 figures; typo corrected, comment expanded
dc.identifierhttps://arxiv.org/abs/0801.3312
dc.identifierhttp://arxiv.org/abs/0801.3312
dc.identifierPhys. Rev. Lett. 100, 146803 (2008)
dc.identifierdoi:10.1103/PhysRevLett.100.146803
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/158384
dc.subjectMesoscale and Nanoscale Physics
dc.titleIntrinsic Gap of the nu=5/2 Fractional Quantum Hall State
dc.typetext

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