Pressure-induced superconductivity in charge-density-wave compound LaTe2-xSbx (x=0 and 0.4)

Xu Chen; Pei-han Sun; Zhenkai Xie; Fanqi Meng; Cuiying Pei; Yanpeng Qi; Tianping Ying; Kai Liu; Jian-gang Guo; Xiaolong Chen

Pressure-induced superconductivity in charge-density-wave compound LaTe2-xSbx (x=0 and 0.4)

Superconductivity 2022-09-19 v2

Authors: Xu Chen , Pei-han Sun , Zhenkai Xie , Fanqi Meng , Cuiying Pei , Yanpeng Qi , Tianping Ying , Kai Liu , Jian-gang Guo , Xiaolong Chen

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Abstract

Here, we have grown single crystals of LaTe2-xSbx (x=0 and 0.4) with continuously adjustable CDW. High-pressure x-ray diffraction show LaTe2 does not undergo phase transition and keep robust below 40 GPa. In-situ high-pressure electrical measurements show LaTe2-xSbx undergo semiconductor-metal-superconductivity transition at 4.6 and 2.5 GPa, respectively. With the doping of Sb, the highest Tc increases from 4.6 to 6.5 K. Theoretical calculations reveal that the CDW has been completely suppressed and the calculated Tc is about 2.97 K at 4.5 GPa, consistent with the measured value. Then, the pressure-induced superconductivity in LaTe2-xSbx can be explained in the framework of the BCS theory.

Keywords

charge density wave pressure-induced superconductivity LaTe2-xSbx high-pressure x-ray diffraction bcs theory single crystal

Cite

@article{arxiv.2209.07188,
  title  = {Pressure-induced superconductivity in charge-density-wave compound LaTe2-xSbx (x=0 and 0.4)},
  author = {Xu Chen and Pei-han Sun and Zhenkai Xie and Fanqi Meng and Cuiying Pei and Yanpeng Qi and Tianping Ying and Kai Liu and Jian-gang Guo and Xiaolong Chen},
  journal= {arXiv preprint arXiv:2209.07188},
  year   = {2022}
}

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11 pages, 5 figures

Pressure-induced superconductivity in charge-density-wave compound LaTe2-xSbx (x=0 and 0.4)

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