منابع مشابه
High-temperature fractional quantum Hall states.
We show that a suitable combination of geometric frustration, ferromagnetism, and spin-orbit interactions can give rise to nearly flatbands with a large band gap and nonzero Chern number. Partial filling of the flatband can give rise to fractional quantum Hall states at high temperatures (maybe even room temperature). While the identification of material candidates with suitable parameters rema...
متن کاملFinite-temperature fractional quantum Hall effect.
We investigate fractional quantum Hall effect at finite temperature using a fermion Chern-Simons field theoretical approach. In the absence of impurity scattering, the essential aspects of fractional quantum Hall effect, such as the quantization of Hall conductance, as well as quasi-particle charge and statistics are unrenormalized by thermal fluctuations. On the other hand, we find that the lo...
متن کاملRoom-temperature quantum Hall effect in graphene.
The quantum Hall effect (QHE), one example of a quantum phenomenon that occurs on a truly macroscopic scale, has attracted intense interest since its discovery in 1980 and has helped elucidate many important aspects of quantum physics. It has also led to the establishment of a new metrological standard, the resistance quantum. Disappointingly, however, the QHE has been observed only at liquid-h...
متن کاملHigh-temperature quantum Hall effect in finite gapped HgTe quantum wells
T. Khouri,1,* M. Bendias,2 P. Leubner,2 C. Brüne,2 H. Buhmann,2 L. W. Molenkamp,2 U. Zeitler,1 N. E. Hussey,1 and S. Wiedmann1,† 1High Field Magnet Laboratory (HFML-EMFL), Radboud University, Nijmegen, The Netherlands 2Physikalisches Institut (EP3), Universität Würzburg, Am Hubland, 97074 Würzburg, Germany (Received 10 December 2015; revised manuscript received 2 March 2016; published 18 March ...
متن کاملClassical percolation fingerprints in the high temperature regime of the quantum Hall effect
We have performed magnetotransport experiments in the hightemperature regime (up to 50K) of the integer quantum Hall effect for two-dimensional electron gases in semiconducting heterostructures. While the magnetic field dependence of the classical Hall law presents no anomaly at high temperatures, we find a breakdown of the Drude–Lorentz law for the longitudinal conductance beyond a crossover m...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2004
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.69.155207