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 (10)

• Cuba - a library for multidimensional numerical integration
• Fermi Surface Nesting and the Origin of the Charge Density Wave in NbSe${}_2$
• Non-thermal separation of electronic and structural orders in a persisting charge density wave
• A quantum phase transition from triangular to stripe charge order in NbSe${}_2$
• Orthorhombic-to-Monoclinic Phase Transition of Ta2NiSe5 Induced by the Bose-Einstein Condensation of Excitons
• Semimetal to semimetal charge density wave transition in 1T-TiSe${}_2$
• Electron-Phonon Coupling and the Soft Phonon Mode in TiSe${}_2$
• On the possibility of an excitonic insulator at the semiconductor-semimetal transition
• Exciton condensation driving the periodic lattice distortion of 1T-TiSe2
• Spectral signatures of the BCS-BEC crossover in the excitonic insulator phase of the extended Falicov-Kimball model

Cited by in corpus (33)

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• Pressure-induced metallization and superconducting phase in ReS2
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• Short-range phase coherence and origin of the 1T-TiSe2 charge density wave
• Collective Modes in Excitonic Insulators: Effects of Electron-Phonon Coupling and Signatures in Optical Response
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• STM microscopy of the CDW in 1T-TiSe2 in the presence of single atom defects
• Charge-density wave induced by combined electron-electron and electron-phonon interactions in 1$T$-TiSe${}_2$: A variational Monte Carlo study
• Competition between excitonic charge and spin density waves: Influence of electron-phonon and Hund's rule couplings
• A New Era of Excitonic Insulators
• Charge Density Wave Hampers Exciton Condensation in 1T-TiSe${}_2$
• Dramatic Plasmon Response to the Charge-Density-Wave Gap Development in $1\text{T}-{\mathrm{TiSe}}_2$
• Structurally assisted melting of excitonic correlations in 1T-TiSe2
• Electric and magnetic multipoles and bond orders in excitonic insulators
• Phase Separation in the Vicinity of Fermi Surface Hot Spots
• New Lithium- and Diamines-Intercalated Superconductors Li${}_x$(C${}_2$H${}_8$N${}_2$)${}_y$TiSe${}_2$ and Li${}_x$(C${}_6$H${}_{16}$N${}_2$)${}_y$TiSe${}_2$
• Electron correlations rule the phonon-driven instability in single layer TiSe${}_2$
• Scattering dominated high-temperature phase of 1T-TiSe2: an optical conductivity study
• Formation and condensation of excitonic bound states in the generalized Falicov-Kimball model
• Excitonic Insulator State of the Extended Falicov-Kimball Model in the Cluster Dynamical Impurity Approximation
• Precursor phase with full phonon softening above the charge-density-wave phase transition in $2H$-TaSe${}_2$
• Spin texture and spin current in excitonic phases of the two-band Hubbard model
• 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
• Combined effects of local and nonlocal hybridization on formation and condensation of excitons in the extended Falicov-Kimball model
• Building bridges: matching density functional theory with experiment
• Doping-induced nematic and stripe orders within the charge density wave state of TiSe${}_2$
• Dependency of quantum time scales on symmetry
• Excitons and Optical Response in Excitonic Insulator Candidate TiSe${}_2$
• CDW-Exciton Condensate Competition and a Condensate Driven Force