Semimetal to semimetal charge density wave transition in 1T-TiSe${}_2$

Abstract

We report an infrared study on 1$T$-TiSe${}_2$, the parent compound of the newly discovered superconductor Cu${}_x$TiSe${}_2$. Previous studies of this compound have not conclusively resolved whether it is a semimetal or a semiconductor: information that is important in determining the origin of its unconventional CDW transition. Here we present optical spectroscopy results that clearly reveal that the compound is metallic in both the high-temperature normal phase and the low-temperature CDW phase. The carrier scattering rate is dramatically different in the normal and CDW phases and the carrier density is found to change with temperature. We conclude that the observed properties can be explained within the scenario of an Overhauser-type CDW mechanism.

arXiv comment4 pages, 4 pages

References in corpus (5)

• Superconductivity in Cu_xTiSe_2
• Bose-Einstein Condensation of Excitons in Bilayer Electron Systems
• Emergence of Fermi pockets in an excitonic CDW melted novel superconductor
• Quantum Melting of the Charge Density Wave State in 1T-TiSe2
• Anisotropic properties of the layered superconductor Cu0.07TiSe2

Cited by in corpus (69)

• Signatures of exciton condensation in a transition metal dichalcogenide
• Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach
• Non-thermal separation of electronic and structural orders in a persisting charge density wave
• Charge density wave and superconducting dome in TiSe2 from electron-phonon interaction
• Strongly Correlated Materials
• Evidence for a Monolayer Excitonic Insulator
• Chiral charge-density-waves
• Optical detection and manipulation of spontaneous gyrotropic electronic order in a transition-metal dichalcogenide semimetal
• Structural phase transition in IrTe${}_2$: A combined study of optical spectroscopy and band structure calculations
• Giant exciton Fano resonance in quasi-one-dimensional Ta${}_2$NiSe${}_5$
• Evolution of the Electronic Structure of 1T-CuxTiSe2
• Ultrafast charge ordering by self-amplified exciton-phonon dynamics in TiSe${}_2$
• Quantum and classical mode softening near the charge-density-wave/superconductor transition of Cu${}_x$TiSe${}_2$: Raman spectroscopic studies
• Electronic and vibrational properties of ${\text{TiSe}}_2$ in the charge-density wave phase from first principles
• Revealing the role of electrons and phonons in the ultrafast recovery of charge density wave correlations in 1$T$-TiSe${}_2$
• Electronic-Structure-Driven Magnetic Ordering in a Kondo Semiconductor CeOs2Al10
• Excitonic and lattice contributions to the charge density wave in 1T-TiSe${}_2$ revealed by a phonon bottleneck
• Optical study of charge instability in CeRu2Al10 in comparison with CeOs2Al10 and CeFe2Al10
• Impact of Electron-Hole Correlations on the 1T-TiSe2 Electronic Structure
• An Alternative Interpretation of Recent ARPES Measurements on TiSe2
• Superconductivity at 2.3 K in the misfit compound (PbSe)1.16(TiSe2)2
• Exciton-phonon cooperative mechanism of the triple-$q$ charge-density-wave and antiferroelectric electron polarization in TiSe${}_2$
• Fermi surface reconstruction and electron dynamics at the charge-density-wave transition in TiSe2
• Charge-density wave induced by combined electron-electron and electron-phonon interactions in 1$T$-TiSe${}_2$: A variational Monte Carlo study
• Electronic structure of copper intercalated transition metal dichalcogenides: First-principles calculations
• On the origin of the anomalous peak in the resistivity of TiSe${}_2$
• Preformed Excitons, Orbital Selectivity, and Charge-Density-Wave Order in 1T-TiSe_2
• First principles vs second principles: Role of charge self-consistency in strongly correlated systems
• Exciton-phonon interactions and superconductivity bordering charge order in TiSe2
• Layered semiconductor EuTe 4 with charge density wave order in square tellurium sheets
• Semiconductor-metal phase transition and emergent charge density waves in 1T-ZrX${}_2$ (X = Se, Te) at the two-dimensional limit
• Effect of synthesis conditions on the electrical resistivity of TiSe${}_2$
• 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
• Unveiling the Charge Density Wave Inhomogeneity and Pseudogap State in 1T-TiSe2
• Phase Separation in the Vicinity of Fermi Surface Hot Spots
• Transport anomalies due to anisotropic interband scattering
• 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${}_2$
• Unconventional Thermophotonic Charge Density Wave
• Investigation of the Non-equilibrium State of Strongly Correlated Materials by Complementary Ultrafast Spectroscopy Techniques
• Optical signatures of type-II Weyl fermions in the noncentrosymmetric semimetals $R$AlSi ($R$=La, Ce, Pr, Nd, Sm)
• Temperature dependence of the excitonic insulator phase model in 1T-TiSe2
• Excitonic insulator emerging from semiconducting normal state in $1T$-TiSe${}_2$
• Electron correlations rule the phonon-driven instability in single layer TiSe${}_2$
• Anomalous metallic state of Cu${}_{0.07}$TiSe${}_2$: an optical spectroscopy study
• Scattering dominated high-temperature phase of 1T-TiSe2: an optical conductivity study
• Ground state phase diagram of a spinless, extended Falicov-Kimball model on the triangular lattice
• Aspects of symmetry and topology in the charge density wave phase of 1T-TiSe2
• Relation between $c$-$f$ hybridization and magnetic ordering in CeRu${}_2$Al${}_{10}$: An optical conductivity study of Ce(Ru${}_{1-x}$Rh${}_x$)${}_2$Al${}_{10}$ ($x\le 0.05$)
• Pressure Driven Phase Transition in 1T-TiSe${}_2$ , a MOIPT+DMFT Study
• Thermodynamic studies of the two dimensional Falicov-Kimball model on a triangular lattice
• Trigonal-to-monoclinic structural transition in TiSe${}_2$ due to a combined condensation of $\text{q}=(\frac{1}{2},0,0)$ and $(\frac{1}{2},0,\frac{1}{2})$ phonon instabilities
• A Pathway to Efficient Simulations of Charge Density Waves in Transition Metal Dichalcogenides: A Case Study for TiSe2
• Phase transitions in a spinless, extended Falicov-Kimball model on the triangular lattice
• Van der Waals Schottky barriers as interface probes of the correlation between chemical potential shifts and charge density wave formation in 1T-TiSe${}_2$ and 2H-NbSe${}_2$
• Point-contact tunneling spectroscopy measurement of Cu${}_x$TiSe${}_2$: disorder-enhanced Coulomb effects
• Non-Wigner-Dyson level statistics and fractal wavefunction of disordered Weyl semimetals
• Impact ionization dynamics in small band-gap 2D materials from a coherent phonon mechanism
• Inelastic X-ray scattering from valence electrons near absorption edges of FeTe and TiSe${}_2$
• In-plane anisotropy of charge density wave fluctuations in 1$T$-TiSe${}_2$
• Spectroscopic fingerprints of many-body renormalizations in$1T$-TiSe${}_2$
• Cluster charge-density-wave glass in hydrogen-intercalated TiSe${}_2$
• Optical amplification in a CDW-phase of a quasi-two dimensional material
• Impact of disorder in the charge-density-wave state of Pd-intercalated ErTe${}_3$ revealed by the electrodynamic response
• ${}^{77}$Se and ${}^{63}$Cu NMR studies of the electronic correlations in Cu${}_x$TiSe${}_2$ ($x=0.05,0.07$)
• Superconductivity in Pd-intercalated charge-density-wave rare earth poly-tellurides RETen
• Excitons and Optical Response in Excitonic Insulator Candidate TiSe${}_2$
• CDW-Exciton Condensate Competition and a Condensate Driven Force