Impact of Electron-Hole Correlations on the 1T-TiSe2 Electronic Structure

Abstract

Several experiments have been performed on 1T-TiSe2 in order to identify whether the electronic structure is semimetallic or semiconducting without reaching a consensus. In this paper, we theoretically study the impact of electron-hole and electron-phonon correlations on the bare semimetallic and semiconducting electronic structure. The resulting electron spectral functions provide a direct comparison of both cases and demonstrate that 1T-TiSe2 is of predominant semiconducting character with some spectral weight crossing the Fermi level.

References in corpus (3)

• A quantum phase transition from triangular to stripe charge order in NbSe${}_2$
• Semimetal to semimetal charge density wave transition in 1T-TiSe${}_2$
• On the possibility of an excitonic insulator at the semiconductor-semimetal transition

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• Scattering dominated high-temperature phase of 1T-TiSe2: an optical conductivity study
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• Precursor phase with full phonon softening above the charge-density-wave phase transition in $2H$-TaSe${}_2$
• DMRG study of exciton condensation in the extended Falicov-Kimball model
• Electron-phonon-dominated charge-density-wave fluctuations in TiSe${}_2$ accessed by ultrafast nonequilibrium dynamics
• Building bridges: matching density functional theory with experiment
• Dependency of quantum time scales on symmetry
• Doping-induced nematic and stripe orders within the charge density wave state of TiSe${}_2$
• Excitons and Optical Response in Excitonic Insulator Candidate TiSe${}_2$