title: Dual evidence of surface Dirac states in thin cylindrical topological insulator Bi₂Te₃ nanowires.
abstract: How the surface state (SS) develops and how the spin transport in a curved cylindrical topological insulator nanowire have attracted theoretical attention recently. However, experimental confirmation for the SS in such a real modeling system still remains insufficient. Here we carried out a systematic comparative study on the cylindrical single-crystal Bi₂Te₃ nanowires of various diameters, and report unambiguously dual evidence for the Dirac SS. Both the predicted anomalous Aharonov-Bohm (AB) quantum oscillations with a period of h/e in H(//) and the 1/2-shifted Shubnikov-de Haas (SdH) oscillations (i.e., γ = -1/2) in H(⊥) were indentified below 1.4 K. In addition, Altshuler-Aronov-Spivak (AAS)-like oscillations with a period of h/2e and ordinary SdH oscillations with γ = 0 were also resolved. These data provide clear evidence of coexistence of the nontrivial topological Dirac state and trivial electron state on the surface of topological insulator nanowire.
authors: High Magnetic Field Laboratory, Chinese Academy of Science, Hefei 230031, Anhui, P. R. China. tianml@hmfl.ac.cn
authors: Mingliang
authors: M
authors: Tian
authors: Wei
authors: W
authors: Ning
authors: Zhe
authors: Z
authors: Qu
authors: Haifeng
authors: H
authors: Du
authors: Jian
authors: J
authors: Wang
authors: Yuheng
authors: Y
authors: Zhang
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