Electron - hole asymmetry and activation energy in quantum Hall ferromagnets

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dc.creatorFal'ko, Vladimir I.
dc.creatorIordanski, S. V.
dc.date2000-03-13
dc.date2000-03-16
dc.date.accessioned2026-07-07T02:37:04Z
dc.date.available2026-07-07T02:37:04Z
dc.descriptionWe argue that the dissipative transport in ferromagnetic quantum Hall effect liquids at $ν=2N+1$ is dominated by the thermal activation of pairs consisting of an electron and an antiskyrmion (topological texture which represents a hole with 'screened' exchange interaction), thus manifesting the lack of electron-hole symmetry in quantum Hall ferromagnets. We find that the activation energy of such a pair is not the exchange energy, but is determined by the interplay between the excess Zeeman energy of a skyrmion and the charging energy of its topological texture: $${\cal E}=aε_{\rm Z}^{1/3}E_{\rm C}^{2/3}\ln ^{1/3}(\frac{\Im_{i}}{E_{\rm C}^{2/3}ε_{\rm Z}^{1/3}}), E_{\rm C}=\frac{e^{2}}{χλ}, $$ with $ a\approx 1.75$.
dc.description4 pages; numerical values of coefficients 'a' and 'ksi' are corrected
dc.identifierhttps://arxiv.org/abs/cond-mat/0003224
dc.identifierhttp://arxiv.org/abs/cond-mat/0003224
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/16151
dc.subjectMesoscale and Nanoscale Physics
dc.titleElectron - hole asymmetry and activation energy in quantum Hall ferromagnets
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