Phys. Rev. B 79, 201304(R) (2009) [4 pages]Observation of three-dimensional behavior in surface states of bismuth nanowires and the evidence for bulk-Bi surface quasiparticles
We studied trigonal Bi nanowires (30 nm<diameter<200 nm) via low-temperature magnetotransport for fields up to 14 T in order to investigate the role of their surfaces. A two-dimensional behavior was expected; we found instead a three-dimensional behavior, with a rich spectrum of Landau levels in a nearly spherical Fermi surface. We show that recent observations of sharp peaks in the bulk-Bi Nernst thermopower near the 9 T quantum limit attributed to charge fractionalization, can be more plausibly interpreted in terms of surface states. Bismuth has a true quantum limit at around 70 T. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.79.201304
DOI:
10.1103/PhysRevB.79.201304
PACS:
73.21.Hb, 68.35.−p, 71.70.Di
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