Visualization of the strain-induced topological phase transition in a quasi-one-dimensional superconductor TaSe3

Chun Lin, Masayuki Ochi, Ryo Noguchi, Kenta Kuroda, Masahito Sakoda, Atsushi Nomura, Masakatsu Tsubota, Peng Zhang, Cedric Bareille, Kifu Kurokawa, Yosuke Arai, Kaishu Kawaguchi, Hiroaki Tanaka, Koichiro Yaji, Ayumi Harasawa, Makoto Hashimoto, Donghui Lu, Shik Shin, Ryotaro Arita, Satoshi Tanda, Takeshi Kondo

doi:10.48550/arxiv.2009.06353

Control of the phase transition from topological to normal insulators can allow for an on/off switching of spin current. While topological phase transitions have been realized by elemental substitution in semiconducting alloys, such an approach requires the preparation of materials with various compositions, thus it is quite far from a feasible device application, which demands a reversible operation. Here we use angle-resolved photoemission spectroscopy (ARPES) and spin-resolved ARPES to visualize the strain-driven band structure evolution of the quasi-1D superconductor TaSe3. We demonstrate that it undergoes reversible strain-induced topological phase transitions from a strong topological insulator phase with spin-polarized, quasi-1D topological surface states, to topologically trivial semimetal and band insulating phases. The quasi-1D superconductor TaSe3 provides a suitable platform for engineering the topological spintronics, for example as an on/off switch for spin current robust against impurity scattering.

Visualization of the strain-induced topological phase transition in a quasi-one-dimensional superconductor TaSe3

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収録刊行物

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Visualization of the strain-induced topological phase transition in a quasi-one-dimensional superconductor TaSe3

この論文をさがす

説明

収録刊行物

被引用文献 (4)*注記

参考文献 (52)*注記

関連プロジェクト

キーワード

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書き出し

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