Observation of an even-denominator quantum number in the fractional quantum Hall effect
1987; American Physical Society; Volume: 59; Issue: 15 Linguagem: Inglês
10.1103/physrevlett.59.1776
ISSN1092-0145
AutoresR. L. Willett, J. P. Eisenstein, H. L. Störmer, D. C. Tsui, A. C. Gossard, J. H. English,
Tópico(s)Graphene research and applications
ResumoAn even-denominator rational quantum number has been observed in the Hall resistance of a two-dimensional electron system. At partial filling of the second Landau level \ensuremath{\nu}=2+(1/2= 5) / 2 and at temperatures below 100 mK, a fractional Hall plateau develops at ${\mathrm{\ensuremath{\rho}}}_{\mathrm{xy}}$=(h/${\mathrm{e}}^{2}$)/(5/2 defined to better than 0.5%. Equivalent even-denominator quantization is absent in the lowest Landau level under comparable conditions.
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