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  • Letter

Pressure-driven reentrant superconductivity in the heavy d-electron superconductor Rh17S15 with weak ferromagnetism in the normal state

Xiaofeng Xu1,*, Jiaying Nie2, Chunqiang Xu3, Ziming Zhu4, Xiangzhuo Xing5,†, Yalei Huang1, Chutong Zhang5, Na Zuo5, Chengcheng Zhao2 et al.

Zheyi Zhang1, Wei Zhou6, Wenhe Jiao1, Sheng Xu1,7, Qin Zhang4, Zhu-An Xu7, Xiaobing Liu5,‡, Dong Qian8,9, and Shiyan Li2,§

  • *Contact author: xuxiaofeng@zjut.edu.cn
  • †Contact author: xzxing@qfnu.edu.cn
  • ‡Contact author: xiaobing.phy@qfnu.edu.cn
  • §Contact author: shiyan_li@fudan.edu.cn

Phys. Rev. B 111, L161113 – Published 15 April, 2025

DOI: https://doi.org/10.1103/PhysRevB.111.L161113

Abstract

Superconductivity beyond the conventional Bardeen-Cooper-Schrieffer framework often emerges out of a normal state that is accompanied by exotic magnetism and thereby displays many exceptional transport and thermodynamic properties. Here we report that the normal state of the heavy d-electron superconductor Rh17S15 is characterized by a weak ferromagnetism that persists up to room temperature. We show that the broad hump in its resistivity likely results from the Kondo interaction of the conduction electrons with this magnetism. By applying pressure, superconductivity is fully suppressed first. In the high-pressure regime, however, we observe a second dome of superconductivity with its maximum Tc greater than the ambient pressure value, highlighting the possible unconventional superconductivity in this heavy d-electron sulfide.

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