Back to Search
Start Over
Spontaneous exciton condensation in 1T-TiSe2: BCS-like approach
- Source :
- Physical Review B: Condensed Matter and Materials Physics (1998-2015), Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2009, pp.045116
-
Abstract
- International audience; Recently we found strong evidence in favor of a BCS-like condensation of excitons in 1T-TiSe2 [Cercellier , Phys. Rev. Lett. 99, 146403 (2007)]. Theoretical photoemission intensity maps have been generated by the spectral function calculated within the exciton condensate phase model and set against experimental angle-resolved photoemission spectroscopy data. The scope of this paper is to present the detailed calculations in the framework of this model. They represent an extension of the original excitonic insulator phase model of Jerome [Phys. Rev. 158, 462 (1967)] to three dimensional and anisotropic band dispersions. A detailed analysis of its properties and comparison with experiment is presented. Finally, the disagreement with density-functional theory is discussed.
- Subjects :
- Condensed Matter::Quantum Gases
condensation
Lattice Instability
excitons
Superlattice Formation
BCS theory
titanium alloys
Insulator
selenium alloys
[PHYS.COND.CM-SCE]Physics [physics]/Condensed Matter [cond-mat]/Strongly Correlated Electrons [cond-mat.str-el]
Tise2
density functional theory
photoemission
Subjects
Details
- ISSN :
- 10980121 and 1550235X
- Database :
- OpenAIRE
- Journal :
- Physical Review B: Condensed Matter and Materials Physics (1998-2015), Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2009, pp.045116
- Accession number :
- edsair.dedup.wf.001..a19319a5133d206d94da0ff081252d16