Wannier Center Analysis on Possible Three-Dimensional Topological Phases in α-Type Layered Organic Conductors
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866914071124639744 |
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| author | Osada, Toshihito |
| author_facet | Osada, Toshihito |
| contents | Topological features of possible three-dimensional (3D) states in α-type layered organic conductors are investigated within a unified framework based on Wannier charge centers (WCCs), aiming to identify their actual topological states. Among the 3D Dirac/Weyl semimetal states of multilayered α-(ET)2I3, the type-I Dirac semimetal state, induced by interlayer spin-orbit coupling (SOC), most effectively explains the observed chiral transport phenomena attributed to the chiral magnetic effect, which originates from the spiral structures of the WCC sheets. In multilayered α-(BETS)2I3, a 3D weak topological insulator (TI) state consistently emerges, irrespective of the presence of interlayer SOC and/or inversion symmetry breaking. The strong TI state suggested by experimental observations appears unlikely to be realized. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_07164 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Wannier Center Analysis on Possible Three-Dimensional Topological Phases in α-Type Layered Organic Conductors Osada, Toshihito Mesoscale and Nanoscale Physics Strongly Correlated Electrons Topological features of possible three-dimensional (3D) states in α-type layered organic conductors are investigated within a unified framework based on Wannier charge centers (WCCs), aiming to identify their actual topological states. Among the 3D Dirac/Weyl semimetal states of multilayered α-(ET)2I3, the type-I Dirac semimetal state, induced by interlayer spin-orbit coupling (SOC), most effectively explains the observed chiral transport phenomena attributed to the chiral magnetic effect, which originates from the spiral structures of the WCC sheets. In multilayered α-(BETS)2I3, a 3D weak topological insulator (TI) state consistently emerges, irrespective of the presence of interlayer SOC and/or inversion symmetry breaking. The strong TI state suggested by experimental observations appears unlikely to be realized. |
| title | Wannier Center Analysis on Possible Three-Dimensional Topological Phases in α-Type Layered Organic Conductors |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2508.07164 |