CDW-Exciton Condensate Competition and a Condensate Driven Force

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dc.citation.epage6en_US
dc.citation.issueNumber8en_US
dc.citation.spage1en_US
dc.citation.volumeNumber85en_US
dc.contributor.authorÖzgün, E.en_US
dc.contributor.authorHakioǧlu, T.en_US
dc.date.accessioned2018-04-12T10:37:14Z
dc.date.available2018-04-12T10:37:14Z
dc.date.issued2016en_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractWe examine the competition between the charge-density wave (CDW) instability and the excitonic condensate (EC) in spatially separated layers of electrons and holes. The CDW and the EC order parameters (OPs), described by two different mechanisms and hence two different transition temperatures TcCDWand TcEC,are self-consistently coupled by a microscopic mean field theory. We discuss the results in our model specifically focusing on the transition-metal dichalcogenides which are considered as the most typical examples of strongly coupled CDW/EC systems with atomic layer separations where the electronic energy scales are large with the critical temperatures in the range TcEC∼ TcCDW∼ 100-200 K. An important consequence of this is that the excitonic energy gap, hence the condensed free energy, vary with the layer separation resulting in a new type of force FEC . We discuss the possibility of this force as the possible driver of the structural lattice deformation observed in some TMDCs with a particular attention on the 1T-TiSe2 below 200 K.en_US
dc.identifier.doi10.7566/JPSJ.85.084706en_US
dc.identifier.issn0031-9015
dc.identifier.urihttp://hdl.handle.net/11693/36354
dc.language.isoEnglishen_US
dc.publisherPhysical Society of Japanen_US
dc.relation.isversionofhttp://dx.doi.org/10.7566/JPSJ.85.084706en_US
dc.source.titleJournal of the Physical Society of Japanen_US
dc.titleCDW-Exciton Condensate Competition and a Condensate Driven Forceen_US
dc.typeArticleen_US

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