Spontaneous exciton condensation in 1T-TiSe2: a BCS-like approach

Details Spontaneous exciton condensation in 1T-TiSe2: a BCS-like approach Spontaneous exciton condensation in 1T-TiSe2: a BCS-like approach

2008-09-11

arxiv.org/abs/0809.1930v1

Phys. Rev. B 79, 045116 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

Submitted to PRB, 11 pages, 7 figures

Scientific paper

10.1103/PhysRevB.79.045116

Recently strong evidence has been found in favor of a BCS-like condensation of excitons in 1\textit{T}-TiSe$_2$. Theoretical photoemission intensity maps have been generated by the spectral function calculated within the excitonic condensate phase model and set against experimental angle-resolved photoemission spectroscopy data. Here, the calculations in the framework of this model are presented in detail. They represent an extension of the original excitonic insulator phase model of J\'erome \textit{et al.} [Phys. Rev. {\bf 158}, 462 (1967)] to three dimensional and anisotropic band dispersions. A detailed analysis of its properties and further comparison with experiment are also discussed

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