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Kramers nodal lines in intercalated TaS2 superconductors
| Citace: |
ZHANG, Y.; GAO, Y.; PULKKINEN, AIO.; GUO, X.; HUANG, J.; GUO, Y.; YUE, Z.; OH, JS.; MOON, A.; OUDAH, M.; GAO, X.; MARMODORO, A.; FEDOROV, A.; MO, S.; HASHIMOTO, M.; LU, D.; RAJAPITAMAHUNI, A.; VESCOVO, E.; KONO, J.; HALLAS, AM.; BIRGENEAU, RJ.; BALICAS, L.; MINÁR, J.; HOSUR, P.; LAW, KT.; MOROSAN, E.; YI, M. Kramers nodal lines in intercalated TaS2 superconductors. Nature Communications, 2025, roč. 16, č. 1, s. nestránkováno. ISSN 2041-1723.
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| Druh: | ČLÁNEK |
| Jazyk publikace: | eng |
| Anglický název: | Kramers nodal lines in intercalated TaS2 superconductors |
| Rok vydání: | 2025 |
| Autoři: | Yichen Zhang , Yuxiang Gao , Aki Ismo Olavi Pulkkinen D.Sc. , Xingyao Guo , Jianwei Huang , Yucheng Guo , Ziqin Yue , Ji Seop Oh , Alex Moon , Mohamed Oudah , Xue-Jian Gao , Dr. Alberto Marmodoro , Alexei Fedorov , Sung-Kwan Mo , Makoto Hashimoto , Donghui Lu , Anil Rajapitamahuni , Elio Vescovo , Junichiro Kono , Alannah M. Hallas , Robert J. Birgeneau , Luis Balicas , prof. Dr. Jan Minár , Pavan Hosur , Kam Tuen Law , Emilia Morosan , Ming Yi |
| Abstrakt EN: | Kramers degeneracy is one fundamental embodiment of the quantum mechanical nature of particles with half-integer spin under time reversal symmetry. Under the chiral and noncentrosymmetric achiral crystalline symmetries, Kramers degeneracy emerges respectively as topological quasiparticles of Weyl fermions and Kramers nodal lines (KNLs), anchoring the Berry phase-related physics of electrons. However, an experimental demonstration for ideal KNLs well isolated at the Fermi level is lacking. Here, we establish a class of noncentrosymmetric achiral intercalated transition metal dichalcogenide superconductors with large Ising-type spin-orbit coupling, represented by InxTaS2, to host an ideal KNL phase. We provide evidence from angle-resolved photoemission spectroscopy with spin resolution, angle-dependent quantum oscillation measurements, and ab-initio calculations. Our work not only provides a realistic platform for realizing and tuning KNLs in layered materials, but also paves the way for exploring the interplay between KNLs and superconductivity, as well as applications pertaining to spintronics, valleytronics, and nonlinear transport. |
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