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arXiv · 2412.10818

Pressure induced superconducting dome in LaNiGa2

Yanan Zhang·Dajun Su·Zhaoyang Shan·Yunshu Shi·Rui Li·Jinyu Wu·Zihan Yang·Kaixin Ye·Fei Zhang·Yanchun Li·Xiaodong Li·Chao Cao·Valentin Taufour·Lin Jiao·Michael Smidman·Huiqiu Yuan
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Abstract

LaNiGa2 is a time-reversal symmetry breaking superconductor with symmetry protected band crossings, making it an ideal platform for investigating the interplay between unconventional superconductivity and electronic structure topology. Here we present a transport study of LaNiGa2 under pressure. The application of pressure to LaNiGa2 induces a significant enhancement of the superconducting transition temperature Tc at a pressure of 7 GPa. In contrast, powder X-ray diffraction (XRD) results show no evidence of structural phase transitions up to 26.3 GPa. Moreover, the ratio of band diffusivity shows a sudden increase at around 7 GPa, suggesting possible pressure-induced changes in the electronic structure that are closely linked to the evolution of superconductivity.

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Yanan Zhang, Dajun Su, Zhaoyang Shan, Yunshu Shi, Rui Li, Jinyu Wu, Zihan Yang, Kaixin Ye, Fei Zhang, Yanchun Li, Xiaodong Li, Chao Cao, Valentin Taufour, Lin Jiao, Michael Smidman, Huiqiu Yuan. 2024-12-14. Pressure induced superconducting dome in LaNiGa2. https://doi.org/10.1007/s11433-024-2536-6

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