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- W3123486721 abstract "Abstract The exploration of topological electronic phases that result from strong electronic correlations is a frontier in condensed matter physics. One class of systems that is currently emerging as a platform for such studies are so-called kagome magnets based on transition metals. Using muon spin-rotation, we explore magnetic correlations in the kagome magnet Co 3 Sn 2−x In x S 2 as a function of In-doping, providing putative evidence for an intriguing incommensurate helimagnetic (HM) state. Our results show that, while the undoped sample exhibits an out-of-plane ferromagnetic (FM) ground state, at 5% of In-doping the system enters a state in which FM and in-plane antiferromagnetic (AFM) phases coexist. At higher doping, a HM state emerges and becomes dominant at the critical doping level of only x cr,1 ≃ 0.3. This indicates a zero temperature first order quantum phase transition from the FM, through a mixed state, to a helical phase at x cr,1 . In addition, at x cr,2 ≃ 1, a zero temperature second order phase transition from helical to paramagnetic phase is observed, evidencing a HM quantum critical point (QCP) in the phase diagram of the topological magnet Co 3 Sn 2−x In x S 2 . The observed diversity of interactions in the magnetic kagome lattice drives non-monotonous variations of the topological Hall response of this system." @default.
- W3123486721 created "2021-02-01" @default.
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- W3123486721 date "2021-05-20" @default.
- W3123486721 modified "2023-10-18" @default.
- W3123486721 title "Multiple quantum phase transitions of different nature in the topological kagome magnet Co3Sn2−xInxS2" @default.
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