Evolution of the Electronic Structure of 1T-CuxTiSe2
J. F. Zhao, H. W. Ou, G. Wu, B. P. Xie, Y. Zhang, D. W. Shen, J. Wei,, L. X. Yang, J. K. Dong, M. Arita, H. Namatame, M. Taniguchi, X. H. Chen, and, D.L. Feng
TL;DR
This study investigates how Cu doping affects the electronic structure, charge density wave, and superconductivity in 1T-CuxTiSe2, revealing the interplay between doping, electronic states, and emergent phenomena.
Contribution
It provides new insights into the evolution of electronic structure and competing phases in 1T-CuxTiSe2 through photoemission spectroscopy analysis.
Findings
Cu doping suppresses charge density wave
Superconductivity is enhanced by increased density of states
High doping causes strong scattering and suppresses superconductivity
Abstract
The electronic structure of a new charge-density-wave/ superconductor system, 1T-CuxTiSe2, has been studied by photoemission spectroscopy. A correlated semiconductor band structure is revealed for the undoped case. With Cu doping, the charge density wave is suppressed by the raising of the chemical potential, while the superconductivity is enhanced by the enhancement of the density of states. Moreover, the strong scattering at high doping might be responsible for the suppression of superconductivity in that regime.
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