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

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

2000-05-26

arxiv.org/abs/cond-mat/0005477v2

Phys. Rev. Lett. 85, 4759 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

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

Scientific paper

10.1103/PhysRevLett.85.4759

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.

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