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Electronic interactions in strongly correlated systems: what is the "glue" for high temperature superconductivity?
Tonica Valla
Recent observation of a "kink" in single-particle dispersion in photoemission experiments on cuprate superconductors has initiated a heated debate over the issue of a boson that me…
Quasi-Particle Spectra, Charge-Density-Wave, Superconductivity and Electron-Phonon Coupling in 2H-NbSe2
T. Valla, A. V. Fedorov, P. D. Johnson +5
High-resolution photoemission has been used to study the electronic structure of the charge density wave (CDW) and superconducting (SC) dichalcogenide, 2H- NbSe2. From the extracte…
Charge-Density-Wave induced modifications to the quasiparticle self-energy in 2H TaSe2
T. Valla, A. V. Fedorov, P. D. Johnson +3
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-densit…
Many-body Effects in Angle-resolved Photoemission: Quasiparticle Energy and Lifetime of a Mo(110) Surface State
T. Valla, A. V. Fedorov, P. D. Johnson +1
In a high-resolution photoemission study of a Mo(110) surface state various contributions to the measured width and energy of the quasiparticle peak are investigated. Electron-phon…