Observation of surface oxidation resistant Shubnikov-de Haas oscillations in Sb2SeTe2 topological insulator

The robustness of Sb2SeTe2 topological insulators against surface oxidation has been comparatively investigated through their magneto-transport and X-ray photoelectron spectroscopic properties with samples freshly cleaved or exposed to air over various timeframes. The magnetoresistance data exhibit...

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Bibliographic Details
Published inJournal of applied physics Vol. 121; no. 5
Main Authors Huang, Shiu-Ming, Huang, Chih-Yang, Huang, Shih-Jhe, Hsu, Ching, Yu, Shih-Hsun, Chou, Mitch, Wadekar, Paritosh V., Chen, Quark Yung-Sung, Tu, Li-Wei
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 07.02.2017
Subjects
Applied physics
Galling
Magnetic properties
Magnetoresistance
Magnetoresistivity
Oscillations
Oxidation
Oxidation resistance
Topological insulators
X ray spectra
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Summary:The robustness of Sb2SeTe2 topological insulators against surface oxidation has been comparatively investigated through their magneto-transport and X-ray photoelectron spectroscopic properties with samples freshly cleaved or exposed to air over various timeframes. The magnetoresistance data exhibit Shubnikov-de Haas oscillations with the same period of oscillations for all samples regardless of surface oxidation, whereas the core-level electron binding energies of the constituent elements vary. That there is no shift in Fermi levels and no smearing-out in the amplitude of oscillations suggests that the surface states of the studied topological insulators are impervious to surface oxidation.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4975621