Pressure-induced evolution of superconductivity and topological electronic structure in <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi mathvariant="normal">LaNiGa</mi><mn>2</mn></msub></mrow></math>

Yikang Li; Ye Yang; Houpu Li; Yuqing Zhang; Yanjun Li; Qingyuan Liu; Rongqi Wu; Xiaopei Cao; Rui Wang; Jianjun Ying; Xianhui Chen

doi:10.1103/cbbg-r8ns

Pressure-induced evolution of superconductivity and topological electronic structure in ${LaNiGa}_{2}$

Yikang Li^1,*, Ye Yang^1,2,*, Houpu Li¹, Yuqing Zhang¹, Yanjun Li¹, Qingyuan Liu¹, Rongqi Wu¹, Xiaopei Cao¹, Rui Wang³ et al.

Jianjun Ying ^1,4,† and Xianhui Chen^1,4,5,‡

¹Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, and CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
²School of Physics, Hefei University of Technology, Hefei, Anhui 230009, China
³Department of Physics & Center of Quantum Materials and Devices & Chongqing Key Laboratory for Strongly Coupled Physics, Chongqing University, Chongqing 400044, China
⁴Hefei National Laboratory, University of Science and Technology of China, Hefei 230088, China
⁵Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China

^*These authors contributed equally to this work.
^†Contact author: yingjj@ustc.edu.cn
^‡Contact author: chenxh@ustc.edu.cn

PDF

Phys. Rev. B 113, 104505 – Published 9 March, 2026

DOI: https://doi.org/10.1103/cbbg-r8ns

Abstract

${LaNiGa}_{2}$ , as a time-reversal symmetry breaking superconductor, has garnered significant attention due to distinctive Dirac points and nonunitary triplet pairing. Here, we investigate the superconducting properties of ${LaNiGa}_{2}$ under high pressure and uncover a dome-like behavior in its superconducting phase, with a maximum critical temperature $T_{C}$ of 3.2 K at approximately 16 GPa. Remarkably, superconductivity abruptly vanishes above 26 GPa, coinciding with an orthorhombic-to-monoclinic structural transition. This pressure-driven evolution may be closely linked to distinct energy shifts of Dirac points and electron-phonon coupling enhancement. Our findings reveal a profound interplay between topological electronic band structure and time-reversal symmetry breaking superconductivity in ${LaNiGa}_{2}$ , offering new insights into the engineering of quantum materials through symmetry and band structure control.

Physical Review B

Export citation

Export citation

Pressure-induced evolution of superconductivity and topological electronic structure in ${LaNiGa}_{2}$

Abstract

Physics Subject Headings (PhySH)

Authorization Required

Other Options

Supplemental Material (Subscription Required)

References (Subscription Required)

Outline

Information

Filter

Filter

Article Lookup

Enter a citation

Pressure-induced evolution of superconductivity and topological electronic structure in LaNiGa2

Abstract

Physics Subject Headings (PhySH)

Authorization Required

Log in via your institution

Log in via APS Member Subscription

Other Options

Supplemental Material (Subscription Required)

References (Subscription Required)

Pressure-induced evolution of superconductivity and topological electronic structure in ${LaNiGa}_{2}$