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Electron-hole balance and the anomalous pressure-dependent superconductivity in black phosphorus

机译:黑磷中的电子-空穴平衡和压力异常超导

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摘要

Here we report the in situ high-pressure (up to ~50-GPa) Hall-effect measurements on single-crystal black phosphorus. We find a strong correlation between the sign of the Hall coefficient, an indicator of the dominant carrier type, and the superconducting transition temperature (T_c). Importantly, we find a change from electron-dominant to hole-dominant carriers in the simple cubic phase of phosphorus at a pressure of ~ 17.2 GPa, providing an explanation for the puzzling valley it displays in its superconducting T_c vs pressure phase diagram. Our results reveal that hole carriers play an important role in developing superconductivity in elemental phosphorus and the valley in T_c at 18.8 GPa is associated with a Lifshitz transition.
机译:在这里,我们报告了单晶黑磷的原位高压(高达〜50-GPa)霍尔效应测量。我们发现霍尔系数的符号(占主导地位的载流子类型)与超导转变温度(T_c)之间具有很强的相关性。重要的是,我们发现在〜17.2 GPa的压力下,简单立方相中的磷从简单的电子态载流子转变为空穴型载流子,这为超导T_c与压力相图中显示的令人迷惑的谷提供了解释。我们的结果表明,空穴载流子在发展元素磷的超导性中起着重要作用,T_c在18.8 GPa处的谷与Lifshitz跃迁有关。

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  • 来源
    《Physical review》 |2017年第22期|224513.1-224513.7|共7页
  • 作者单位

    Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China;

    Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China,University of Chinese Academy of Sciences, Beijing 100190, China;

    Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA;

    Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China;

    Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China,University of Chinese Academy of Sciences, Beijing 100190, China;

    Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China,University of Chinese Academy of Sciences, Beijing 100190, China;

    Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China,University of Chinese Academy of Sciences, Beijing 100190, China;

    Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China,University of Chinese Academy of Sciences, Beijing 100190, China;

    Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China;

    Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China;

    Institute of High Energy Physics, Chinese Academy of Science, Beijing 100049, China;

    Shanghai Synchrotron Radiation Facilities, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China;

    Shanghai Synchrotron Radiation Facilities, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China;

    Shanghai Synchrotron Radiation Facilities, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China;

    Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China;

    Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China,University of Chinese Academy of Sciences, Beijing 100190, China,Collaborative Innovation Center of Quantum Matter, Beijing 100190, China;

    Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA;

    Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China,University of Chinese Academy of Sciences, Beijing 100190, China,Collaborative Innovation Center of Quantum Matter, Beijing 100190, China;

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