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Preformed excitons, orbital selectivity, and charge density wave order in 1T-TiSe2

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dc.contributor.author Koley, S.
dc.contributor.author Laad, M. S.
dc.contributor.author Vidhyadhiraja, N. S.
dc.contributor.author Taraphder, A.
dc.date.accessioned 2017-02-21T09:35:42Z
dc.date.available 2017-02-21T09:35:42Z
dc.date.issued 2014
dc.identifier.citation Koley, S; Laad, MS; Vidhyadhiraja, NS; Taraphder, A, Preformed excitons, orbital selectivity, and charge density wave order in 1T-TiSe2. Physical Review B 2014, 90 (11), 115146 http://dx.doi.org/10.1103/PhysRevB.90.115146 en_US
dc.identifier.citation Physical Review B en_US
dc.identifier.citation 90 en_US
dc.identifier.citation 11 en_US
dc.identifier.issn 2469-9950
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/2581
dc.description Restricted Access en_US
dc.description.abstract Traditional routes to charge density wave (CDW) in transition-metal dichalcogenides, relying on Fermi surface nesting or Jahn-Teller instabilities, have recently been brought into question. While this calls for exploration of alternative views, a paucity of theoretical guidance sustains lively controversy on the origin of, and interplay between, CDW and superconductive orders in transition-metal dichalcogenides. Here, we explore a preformed excitonic liquid route, heavily supplemented by modern correlated electronic-structure calculations, to an excitonic CDW order in 1T-TiSe2. We show that orbital-selective dynamical localization arising from preformed excitonic liquid correlations is somewhat reminiscent of states proposed for d and f band quantum criticality at the border of magnetism. Excellent quantitative explication of a wide range of spectral and transport responses in both normal and CDW phases provides strong support for our scenario, and suggests that soft excitonic liquid fluctuations mediate superconductivity in a broad class of transition-metal dichalcogenides on the border of CDW. This brings the transition-metal dichalcogenides closer to the bad actors (where the metallic state is clearly not a Fermi liquid) in d and f band systems, where anomalously soft fluctuations of electronic origin are believed to mediate unconventional superconductivity on the border of magnetism. en_US
dc.description.uri 2469-9969 en_US
dc.description.uri http://dx.doi.org/10.1103/PhysRevB.90.115146 en_US
dc.language.iso English en_US
dc.publisher American Physical Society en_US
dc.rights @American Physical Society, 2014 en_US
dc.subject Condensed Matter Physics en_US
dc.subject Superconductivity en_US
dc.subject Transition en_US
dc.subject Temperature en_US
dc.subject Dimensions en_US
dc.subject Anomalies en_US
dc.subject 1T-TaS2 en_US
dc.subject State en_US
dc.subject TiSe2 en_US
dc.title Preformed excitons, orbital selectivity, and charge density wave order in 1T-TiSe2 en_US
dc.type Article en_US


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