FermiologywithnodalstructuresinnonsymmorphicsuperconductorLaNiGa2:AdeHaas-vanAlphenstudy<iclass="icon-zqcb"></i>

被引：0

作者：

Houpu Li ^{[1
]}

Ye Yang ^{[2
,3
]}

Mengzhu Shi ^{[2
]}

Yingcai Qian ^{[1
,4
]}

Senyang Pan ^{[1
,4
]}

Kaibao Fan ^{[2
]}

Nan Zhang ^{[1
]}

Kaixin Tang ^{[2
]}

Hongyu Li ^{[2
]}

Zhiwei Wang ^{[1
]}

Jinglei Zhang ^{[4
]}

Chuanying Xi ^{[4
]}

Ziji Xiang ^{[2
,5
]}

Xianhui Chen ^{[1
,2
,5
]}

机构：

[1] Department of Physics, University of Science and Technology of China

[2] Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China

[3] School of Physics, Hefei University of Technology

[4] High Magnetic Field Laboratory, Chinese Academy of Sciences

[5] Hefei National Laboratory, University of Science and Technology of

来源：

Science China(Physics,Mechanics & Astronomy) | 2025年 / 04期

关键词：

D O I：

暂无

中图分类号：

O413 [量子论];

学科分类号：

摘要：

Topological metals possess various types of symmetry-protected degenerate band crossings.When a topological metal becomes superconducting,the low-energy electronic excitations stemming from the band crossings located close to the Fermi level may contribute to highly unusual pairing symmetry and superconducting states.In this work,we study the electronic band structure of the time-reversal symmetry breaking superconductor La Ni Ga2by means of quantum oscillation measurements.A comprehensive investigation combining angle-resolved high-field de Haas-van Alphen （dHvA） spectroscopy and first-principles calculations reveals the fermiology of La Ni Ga2and verifies its nonsymmorphic Cmcm lattice symmetry,which promises nodal band crossings pinned at the Fermi level with fourfold degeneracies.Moreover,such nodal structures,proposed to play a crucial role giving rise to the interorbital triplet pairing,are indeed captured by our d Hv A analysis.Our results identify La Ni Ga2as a prototypical topological crystalline superconductor and highlight the putative contribution of low-energy nodal quasiparticles to unconventional superconducting pairing.

引用

页码：193 / 201

页数：9