MANY-BODY EFFECTS IN ANGLE-RESOLVED PHOTOEMISSION : QUASIPARTICLE ENERGY AND LIFETIME OF A MO(110) SURFACE STATE

@article{Valla1999MANYBODYEI,
  title={MANY-BODY EFFECTS IN ANGLE-RESOLVED PHOTOEMISSION : QUASIPARTICLE ENERGY AND LIFETIME OF A MO(110) SURFACE STATE},
  author={Tonica Valla and Alexei V. Fedorov and P. D. Johnson and Steven L Hulbert},
  journal={Physical Review Letters},
  year={1999},
  volume={83},
  pages={2085-2088}
}
Recent investigations of strongly correlated electron systems have questioned the validity of one of the most fundamental paradigms in solid state physics— Fermi liquid theory. The latter picture is based on the existence of “quasiparticles,” or single-particle-like low energy excitations which obey the exclusion principle and have lifetimes long enough to be considered as particles. Strictly speaking, the quasiparticle concept is restricted to zero temperature and a narrow region around the… Expand

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