Unconventional double gap
A kagome-lattice superconductor exhibiting two distinct superconducting gaps, with the lower-temperature gap hosting low-energy quasiparticles possibly due to nodes, and the two regimes showing different transport and thermodynamic behaviors.
Hossain, Md Shafayat · Qi, Zhang · Choi, Eun-sang · Ratkovski, Danilo Roberto · Luscher, Bernhard · Li, Yongkai · Jiang, Yuxiao · Litskevich, Maksim · Zi-Jia, Cheng · Yin, Jiaxin · Cochran, Tyler A. · Casas, Brian · Kim, Byunghoon · Xian, Yang · Liu, Jinjin · Yao, Yugui · Bangura, Alimamy Frank · Zhiwei, Wang · Fischer, Mark H. · Neupert, Titus · Balicas, Luis · Hasan, M. Zahid
Nature Physics 2025
Two superconducting regimes with distinct transport and thermodynamic properties
Substantial quasiparticle weight in the high-temperature regime
Quasiparticle weight removed at lower temperatures through formation of a second gap
Second gap possibly has nodal structure, hosting low-energy quasiparticles