Charge-Density-Wave induced modifications to the quasiparticle self-energy in 2H TaSe2

T. Valla; A. V. Fedorov; P. D. Johnson; J. Xue; K. E. Smith; F. J. Di Salvo

doi:10.1103/PhysRevLett.85.4759

Charge-Density-Wave induced modifications to the quasiparticle self-energy in 2H TaSe2

Strongly Correlated Electrons 2007-05-23 v2 Superconductivity

Authors: T. Valla , A. V. Fedorov , P. D. Johnson , J. Xue , K. E. Smith , F. J. Di Salvo

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Abstract

The self-energy of the photo-hole in 2H-TaSe2 is measured by angle-resolved photoemission spectroscopy (ARPES) as a function of binding energy and temperature. In the charge-density wave (CDW) state, a structure in the self- energy is detected at ~ 65 meV that can not be explained by electron-phonon scattering. A reduction in the scattering rates below this energy indicates the collapse of a major scattering channel with the formation of the CDW state, accompanying the appearance of a bosonic "mode" in the excitation spectrum of the system.

Keywords

charge-density wave photo-hole self-energy angle-resolved photoemission spectroscopy electron-phonon scattering bosonic mode

Cite

@article{arxiv.cond-mat/0005477,
  title  = {Charge-Density-Wave induced modifications to the quasiparticle self-energy in 2H TaSe2},
  author = {T. Valla and A. V. Fedorov and P. D. Johnson and J. Xue and K. E. Smith and F. J. Di Salvo},
  journal= {arXiv preprint arXiv:cond-mat/0005477},
  year   = {2007}
}

Comments

4 pages, 4 eps figures, minor changes, references added

Charge-Density-Wave induced modifications to the quasiparticle self-energy in 2H TaSe2

Abstract

Keywords

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