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Strong-coupling charge density wave in monolayer TiSe2

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dc.contributor.authorWatson, Matthew D
dc.contributor.authorRajan, Akhil
dc.contributor.authorAntonelli, Tommaso
dc.contributor.authorUnderwood, Kaycee
dc.contributor.authorMarković, Igor
dc.contributor.authorMazzola, Federico
dc.contributor.authorClark, Oliver Jon
dc.contributor.authorSiemann, Gesa-Roxanne
dc.contributor.authorBiswas, Deepnarayanan
dc.contributor.authorHunter, Andrew
dc.contributor.authorJandura, Sven
dc.contributor.authorReichstetter, Janika
dc.contributor.authorMclaren, Martin
dc.contributor.authorLe Fèvre, Patrick
dc.contributor.authorVinai, Giovanni
dc.contributor.authorKing, Philip D C
dc.date.accessioned2021-10-11T23:43:16Z
dc.date.available2021-10-11T23:43:16Z
dc.date.issued2020-10-12
dc.identifier269685659
dc.identifier3ca8054d-c6d0-4d98-a158-cce737e93ad0
dc.identifier85094861951
dc.identifier000578365900001
dc.identifier.citationWatson , M D , Rajan , A , Antonelli , T , Underwood , K , Marković , I , Mazzola , F , Clark , O J , Siemann , G-R , Biswas , D , Hunter , A , Jandura , S , Reichstetter , J , Mclaren , M , Le Fèvre , P , Vinai , G & King , P D C 2020 , ' Strong-coupling charge density wave in monolayer TiSe 2 ' , 2D Materials , vol. 8 , no. 1 , 015004 . https://doi.org/10.1088/2053-1583/abafecen
dc.identifier.issn2053-1583
dc.identifier.othercrossref: 10.1088/2053-1583/abafec
dc.identifier.otherORCID: /0000-0002-0737-2814/work/83086134
dc.identifier.otherORCID: /0000-0003-1350-6222/work/83086138
dc.identifier.otherORCID: /0000-0001-5356-3032/work/83086141
dc.identifier.otherORCID: /0000-0003-0029-5059/work/101218140
dc.identifier.urihttps://hdl.handle.net/10023/24111
dc.descriptionAuthors gratefully acknowledge funding from The Royal Society, The Leverhulme Trust, and the European Research Council (through the ERC-714193-QUESTDO project). The MBE growth facility was funded through the Engineering and Physical Sciences Research Council (EPSRC) under Grant No. EP/M023958/1. KU and OJC acknowledge the EPSRC for PhD studentship support via Grant Nos. EP/L015110/1 and EP/K503162/1, and IM the International Max Planck Research School for Chemistry and Physics of Quantum Materials. We thank SOLEIL synchrotron for access to the CASSIOPEE beamline (proposal 20171202) and Elettra synchrotron for access to the APE-HE beamline, which both contributed to the results presented here. This work has been partially performed in the framework of the Nanoscience Foundry and Fine Analysis (NFFA-MIUR Italy Progetti Internazionali) facility. The research leading to this result has been supported by the project CALIPSOplus under Grant Agreement 730872 from the EU Framework Programme for Research and Innovation HORIZON 2020.en
dc.description.abstractWe study the 2 × 2 charge density wave (CDW) in epitaxially-grown monolayer TiSe2. Our temperature-dependent angle-resolved photoemission spectroscopy measurements indicate a strong-coupling instability, but reveal how not all states couple equally to the symmetry-breaking distortion, with an electron pocket persisting to low temperature as a non-bonding state. We further show how the CDW order can be suppressed by a modest doping of around 0.06(2) electrons per Ti. Our results provide an opportunity for quantitative comparison with a realistic tight-binding model, which emphasises a crucial role of structural aspects of the phase transition in understanding the hybridisation in the ground state. Together, our work provides a comprehensive understanding of the phenomenology of the CDW in TiSe2 in the 2D limit.
dc.format.extent10
dc.format.extent8322935
dc.language.isoeng
dc.relation.ispartof2D Materialsen
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.subjectDASen
dc.subjectMCPen
dc.subject.lccQCen
dc.subject.lccTKen
dc.titleStrong-coupling charge density wave in monolayer TiSe2en
dc.typeJournal articleen
dc.contributor.sponsorEPSRCen
dc.contributor.sponsorEPSRCen
dc.contributor.sponsorThe Leverhulme Trusten
dc.contributor.sponsorThe Royal Societyen
dc.contributor.sponsorEuropean Research Councilen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Centre for Designer Quantum Materialsen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.identifier.doi10.1088/2053-1583/abafec
dc.description.statusPeer revieweden
dc.date.embargoedUntil2021-10-12
dc.identifier.grantnumberEP/M023958/1en
dc.identifier.grantnumberEP/L015110/1en
dc.identifier.grantnumber2016-006en
dc.identifier.grantnumberURF/R/180026en
dc.identifier.grantnumber714193en


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