Journal
SCIENCE BULLETIN
Volume 66, Issue 14, Pages 1384-1388Publisher
ELSEVIER
DOI: 10.1016/j.scib.2021.04.043
Keywords
Kagome superconductor; Charge density wave; Time-reversal symmetry breaking; Chiral flux phase
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Funding
- National Program on Key Basic Research Project of China (973 Program) [2017YFA0303100]
- National Natural Science Foundation of China [11888101]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB28000000]
- IOP-CAS
- U.S. Department of Energy, Basic Energy Sciences Grant [DE-FG02-99ER45747]
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The study identifies a chiral flux phase in the quasi-2D Kagome superconductor AV(3)Sb(5), which has the lowest energy and exhibits 2 x 2 charge orders observed experimentally. This phase breaks time-reversal symmetry and displays anomalous Hall effect.
We argue that the topological charge density wave phase in the quasi-2D Kagome superconductor AV(3)Sb(5) is a chiral flux phase. Considering the symmetry of the Kagome lattice, we show that the chiral flux phase has the lowest energy among those states which exhibit 2 x 2 charge orders observed experimentally. This state breaks the time-reversal symmetry and displays anomalous Hall effect. The explicit pattern of the density of state in real space is calculated. These results are supported by recent experiments and suggest that these materials are new platforms to investigate the interplay between topology, superconductivity and electron-electron correlations. (C) 2021 Published by Elsevier B.V. on behalf of Science China Press.
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