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Pubmed for Handhelds

PUBMED FOR HANDHELDS

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  • Title: Theory of the three-dimensional quantum Hall effect in graphite.
    Author: Bernevig BA, Hughes TL, Raghu S, Arovas DP.
    Journal: Phys Rev Lett; 2007 Oct 05; 99(14):146804. PubMed ID: 17930699.
    Abstract:
    We predict the existence of a three-dimensional quantum Hall effect plateau in a graphite crystal subject to a magnetic field. The plateau has a Hall conductivity quantized at 4e2/variant Planck's over 2pi 1/c0 with c0 the c-axis lattice constant. We analyze the three-dimensional Hofstadter problem of a realistic tight-binding Hamiltonian for graphite, find the gaps in the spectrum, and estimate the critical value of the magnetic field above which the Hall plateau appears. When the Fermi level is in the bulk Landau gap, Hall transport occurs through the appearance of chiral surface states. We estimate the magnetic field necessary for the appearance of the effect to be 15.4 T for electron carriers and 7.0 T for holes.
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