On the origin of the anomalous peak in the resistivity of TiSe${}_2$

Abstract

Resistivity measurements of TiSe${}_2$ typically show only a weak change in gradient at the charge density wave transition at $T_{CDW}\approx$ 200~K, but more prominently feature a broad peak at a lower $T_{peak}\sim$ 165~K, which has remained poorly understood despite decades of research on the material. Here we present quantitative simulations of the resistivity using a simplified parametrization of the normal state band structure, based on recent photoemission data. Our simulations reproduce the overall profile of the resistivity of TiSe${}_2$, including its prominent peak, without implementing the CDW at all. We find that the peak in resistivity corresponds to a crossover between a low temperature regime with electron-like carriers only, to a regime around room temperature where thermally activated and highly mobile hole-like carriers dominate the conductivity. Even when implementing substantial modifications to model the CDW below the transition temperature, we find that these thermal population effects still dominate the transport properties of TiSe${}_2$.

References in corpus (6)

• Controlling many-body states by the electric-field effect in a two-dimensional material
• Semimetal to semimetal charge density wave transition in 1T-TiSe${}_2$
• Observation of a Charge Density Wave Incommensuration Near the Superconducting Dome in CuxTiSe2
• Doping nature of native defects in 1T-TiSe2
• Enhancing charge-density-wave order in 1T-TiSe2 nanosheet by encapsulation with hexagonal Boron Nitride
• Scattering dominated high-temperature phase of 1T-TiSe2: an optical conductivity study

Cited by in corpus (8)

• Structurally assisted melting of excitonic correlations in 1T-TiSe2
• Correlation between electronic and structural orders in 1T-TiSe2
• Superconductivity induced by gate-driven hydrogen intercalation in the charge-density-wave compound 1T-TiSe2
• Electron correlations rule the phonon-driven instability in single layer TiSe${}_2$
• Optically induced symmetry breaking due to nonequilibrium steady state formation in charge density wave material 1T-TiSe2
• Peculiarities of electron transport and resistive switching in point contacts on TiSe2, TiSeS and CuxTiSe2
• Evidence of anisotropic three-dimensional weak-localization in TiSe${}_2$ nanoflakes
• Doping-induced nematic and stripe orders within the charge density wave state of TiSe${}_2$