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Band hybridization at the semimetal-semiconductor transition of Ta2NiSe5 enabled by mirror-symmetry breaking
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dc.contributor.author | Watson, Matthew David | |
dc.contributor.author | Markovic, Igor | |
dc.contributor.author | Abarca Morales, Edgar | |
dc.contributor.author | Le Fevre, Patrick | |
dc.contributor.author | Merz, Michael | |
dc.contributor.author | Haghighirad, Amir A. | |
dc.contributor.author | King, Philip D. C. | |
dc.date.accessioned | 2020-04-03T15:30:02Z | |
dc.date.available | 2020-04-03T15:30:02Z | |
dc.date.issued | 2020-03-02 | |
dc.identifier.citation | Watson , M D , Markovic , I , Abarca Morales , E , Le Fevre , P , Merz , M , Haghighirad , A A & King , P D C 2020 , ' Band hybridization at the semimetal-semiconductor transition of Ta 2 NiSe 5 enabled by mirror-symmetry breaking ' , Physical Review Research , vol. 2 , no. 1 , 013236 . https://doi.org/10.1103/PhysRevResearch.2.013236 | en |
dc.identifier.issn | 2643-1564 | |
dc.identifier.other | PURE: 266202946 | |
dc.identifier.other | PURE UUID: b922d5e8-13ad-4e9b-98ad-0c00a0e89a41 | |
dc.identifier.other | ORCID: /0000-0002-1631-9556/work/71560007 | |
dc.identifier.other | ORCID: /0000-0002-0737-2814/work/71560039 | |
dc.identifier.other | WOS: 000602693500003 | |
dc.identifier.other | Scopus: 85084386437 | |
dc.identifier.uri | https://hdl.handle.net/10023/19753 | |
dc.description | Funding: The Leverhulme Trust and The Royal Society. | en |
dc.description.abstract | We present a combined study from angle-resolved photoemission and density-functional-theory calculations of the temperature-dependent electronic structure in the excitonic insulator candidate Ta2NiSe5. Our experimental measurements unambiguously establish the normal state as a semimetal with a significant band overlap of >100 meV. Our temperature-dependent measurements indicate how these low-energy states hybridize when cooling through the well-known 327 K phase transition in this system. From our calculations and polarization-dependent photoemission measurements, we demonstrate the importance of a loss of mirror symmetry in enabling the band hybridization, driven by a shearlike structural distortion which reduces the crystal symmetry from orthorhombic to monoclinic. Our results thus point to the key role of the lattice distortion in enabling the phase transition of Ta2NiSe5. | |
dc.format.extent | 6 | |
dc.language.iso | eng | |
dc.relation.ispartof | Physical Review Research | en |
dc.rights | Copyright © 2020 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. | en |
dc.subject | QC Physics | en |
dc.subject | TK Electrical engineering. Electronics Nuclear engineering | en |
dc.subject | DAS | en |
dc.subject.lcc | QC | en |
dc.subject.lcc | TK | en |
dc.title | Band hybridization at the semimetal-semiconductor transition of Ta2NiSe5 enabled by mirror-symmetry breaking | en |
dc.type | Journal article | en |
dc.contributor.sponsor | The Royal Society | en |
dc.contributor.sponsor | The Leverhulme Trust | en |
dc.description.version | Publisher PDF | en |
dc.contributor.institution | University of St Andrews. Centre for Designer Quantum Materials | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. Condensed Matter Physics | en |
dc.identifier.doi | https://doi.org/10.1103/PhysRevResearch.2.013236 | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | URF/R/180026 | en |
dc.identifier.grantnumber | 2016-006 | en |
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