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Título

Role of the surface states in the magnetotransport properties of ultrathin bismuth films

AutorMarcano, N.; Sangiao, S.; Magen, Cesar; Morellón, Luis; Ibarra, M. Ricardo; Plaza, M.; Pérez, L.; Teresa, José María de
Fecha de publicaciónsep-2010
EditorAmerican Physical Society
CitaciónPhysical Review B 82(12): 125326 (2010)
ResumenWe have investigated the magnetotransport properties of ultrathin films of Bi grown on thermally oxidized Si(001) substrates with thickness ranging from 10 to 100 nm at temperatures down to 2 K and in magnetic fields up to 90 kOe. Remarkable differences both in temperature and field dependence of the Hall resistivity are found for the films with thickness above and below 20 nm. These observations can be explained due to the presence of surface states, which play an important role in determining the electronic transport properties of the thinnest films. The estimated surface carrier density 4×1013 cm−2 at room temperature correlates well with that recently reported from angle-resolved photoemission spectroscopy on ultrathin Bi(001) films.
Descripción6 páginas, 8 figuras, 1 tabla.-- PACS number(s): 73.20.-r, 73.25.+i, 73.50.Jt
Versión del editorhttp://dx.doi.org/10.1103/PhysRevB.82.125326
URIhttp://hdl.handle.net/10261/47771
DOI10.1103/PhysRevB.82.125326
ISSN1098-0121
E-ISSN1550-235X
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