Oscillating planar Hall response in bulk crystal of topological insulator Sn doped Bi1.1Sb0.9Te2S

Bin Wu, Xing Chen Pan, Wenkai Wu, Fucong Fei, Bo Chen, Qianqian Liu, Haijun Bu, Lu Cao, Fengqi Song, Baigeng Wang

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16 Citations (Scopus)


We report the low-temperature magneto-transport in the bulk-insulating single crystal of topological insulator Sn doped Bi1.1Sb0.9Te2S. Shubnikov-de Haas oscillations appear with their reciprocal frequency proportional to cos θ, demonstrating the dominant transport of topological surface states. While the magnetic field rotates on the sample surface, the planar Hall effect arises with sizeable oscillations following a relation of cos θ sin θ. Its amplitude reaches the maximum at the lowest temperature and drops to nearly zero at temperature higher than 100 K. All these evidences consolidate such planar Hall oscillations as another golden criterion on the topological surface transport.

Original languageEnglish
Article number011902
JournalApplied Physics Letters
Issue number1
Publication statusPublished - 2018 Jul 2
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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