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, and F. J. DiSalvo
Phys. Rev. Lett. 85, 4759 – Published 27 November 2000
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Abstract

The self-energy of the photohole in 2HTaSe2 is measured by angle-resolved photoemission spectroscopy as a function of binding energy and temperature. In the charge-density wave (CDW) state, a structure in the self-energy is detected at 65meV that cannot 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.

  • Received 30 May 2000

DOI:https://doi.org/10.1103/PhysRevLett.85.4759

©2000 American Physical Society

Authors & Affiliations

T. Valla1, A. V. Fedorov1, P. D. Johnson1, J. Xue2, K. E. Smith2, and F. J. DiSalvo3

  • 1Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000
  • 2Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215
  • 3Department of Chemistry, Baker Laboratory, Cornell University, Ithaca, New York 14853

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Vol. 85, Iss. 22 — 27 November 2000

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