Dirac nodal lines and nodal loops in the topological kagome superconductor <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>CsV</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi>Sb</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>
Zhanyang Hao, Yongqing Cai, Yixuan Liu, Yuan Wang, Xuelei Sui, Xiao‐Ming Ma, Zecheng Shen, Zhicheng Jiang, Yichen Yang, Wan‐Ling Liu, Qi Jiang, Zhengtai Liu, Mao Ye, Dawei Shen, Yi Liu, Shengtao Cui, Jiabin Chen, Le Wang, Cai Liu, Junhao Lin, Jianfeng Wang, Bing Huang, Jia‐Wei Mei, Kai Chen
Abstract
Recently, V-based kagome superconductors have emerged as a new research topic in condensed matter physics by intertwining superconductivity, charge density wave, and strong correlation. Here, the authors identify CsV${}_{3}$Sb${}_{5}$ as a Dirac nodal-line semimetal by determining multiple Dirac nodal lines and loops close to the Fermi level with the help of ARPES and first-principles calculations. These nodal lines and loops could provide yet another source for obtaining larger Berry curvature and, hence, larger anomalous Hall conductivity, thus offering essential insight into the exotic transport behavior observed.