Comment on "Signatures of Surface States in Bismuth at High Magnetic Fields"

Details Comment on "Signatures of Surface States in Bismuth at High Magnetic Fields" Comment on "Signatures of Surface States in Bismuth at High Magnetic Fields"

2009-10-07

arxiv.org/abs/0910.1256v1

Physics

Condensed Matter

Strongly Correlated Electrons

1 page & 1 figure

Scientific paper

Nernst effect is the transverse electric field due to a longitudinal thermal gradient in presence of magnetic field. Its magnitude was recently studied up to 33 T in a bismuth single crystal with a magnetic field oriented along the trigonal axis . In addition to quantum oscillations of the Nernst response, a rich structure with several additional peaks was also detected when the magnetic field exceeded the quantum limit, which is of the order of 10 T in this configuration. The origin of these high-field Nernst anomalies is a subject of ongoing research. Very recently, Seradjeh, Wu, and Phillips have suggested that a surface state can give rise to these anomalies. This proposal does not resist a critical examination.

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