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Observation of giant room-temperature anisotropic magnetoresistance in the topological insulator β-Ag2Te

Author

Listed:
  • Wei Ai

    (Nankai University)

  • Fuyang Chen

    (South China Normal University)

  • Zhaochao Liu

    (Nankai University)

  • Xixi Yuan

    (Chongqing University)

  • Lei Zhang

    (Nankai University)

  • Yuyu He

    (Nankai University)

  • Xinyue Dong

    (Nankai University)

  • Huixia Fu

    (Chongqing University)

  • Feng Luo

    (Nankai University)

  • Mingxun Deng

    (South China Normal University)

  • Ruiqiang Wang

    (South China Normal University)

  • Jinxiong Wu

    (Nankai University)

Abstract

Achieving room-temperature high anisotropic magnetoresistance ratios is highly desirable for magnetic sensors with scaled supply voltages and high sensitivities. However, the ratios in heterojunction-free thin films are currently limited to only a few percent at room temperature. Here, we observe a high anisotropic magnetoresistance ratio of −39% and a giant planar Hall effect (520 μΩ⋅cm) at room temperature under 9 T in β-Ag2Te crystals grown by chemical vapor deposition. We propose a theoretical model of anisotropic scattering — induced by a Dirac cone tilt and modulated by intrinsic properties of effective mass and sound velocity — as a possible origin. Moreover, small-size angle sensors with a Wheatstone bridge configuration were fabricated using the synthesized β-Ag2Te crystals. The sensors exhibited high output response (240 mV/V), high angle sensitivity (4.2 mV/V/°) and small angle error (

Suggested Citation

  • Wei Ai & Fuyang Chen & Zhaochao Liu & Xixi Yuan & Lei Zhang & Yuyu He & Xinyue Dong & Huixia Fu & Feng Luo & Mingxun Deng & Ruiqiang Wang & Jinxiong Wu, 2024. "Observation of giant room-temperature anisotropic magnetoresistance in the topological insulator β-Ag2Te," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45643-y
    DOI: 10.1038/s41467-024-45643-y
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    References listed on IDEAS

    as
    1. Abhinav Kandala & Anthony Richardella & Susan Kempinger & Chao-Xing Liu & Nitin Samarth, 2015. "Giant anisotropic magnetoresistance in a quantum anomalous Hall insulator," Nature Communications, Nature, vol. 6(1), pages 1-6, November.
    2. A. A. Taskin & Henry F. Legg & Fan Yang & Satoshi Sasaki & Yasushi Kanai & Kazuhiko Matsumoto & Achim Rosch & Yoichi Ando, 2017. "Planar Hall effect from the surface of topological insulators," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
    3. Jiadong Zhou & Wenjie Zhang & Yung-Chang Lin & Jin Cao & Yao Zhou & Wei Jiang & Huifang Du & Bijun Tang & Jia Shi & Bingyan Jiang & Xun Cao & Bo Lin & Qundong Fu & Chao Zhu & Wei Guo & Yizhong Huang &, 2022. "Author Correction: Heterodimensional superlattice with in-plane anomalous Hall effect," Nature, Nature, vol. 611(7934), pages 1-1, November.
    4. Jiadong Zhou & Wenjie Zhang & Yung-Chang Lin & Jin Cao & Yao Zhou & Wei Jiang & Huifang Du & Bijun Tang & Jia Shi & Bingyan Jiang & Xun Cao & Bo Lin & Qundong Fu & Chao Zhu & Wei Guo & Yizhong Huang &, 2022. "Heterodimensional superlattice with in-plane anomalous Hall effect," Nature, Nature, vol. 609(7925), pages 46-51, September.
    5. R. Xu & A. Husmann & T. F. Rosenbaum & M.-L. Saboungi & J. E. Enderby & P. B. Littlewood, 1997. "Large magnetoresistance in non-magnetic silver chalcogenides," Nature, Nature, vol. 390(6655), pages 57-60, November.
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