ARPES: Novel effects in the energy and momentum distributions of nearly antiferromagnetic metals
- Universitaet zu Koeln (Germany)
- Florida State Univ., Tallahassee, FL (United States)
The physical origin of two effects, i.e. shadow bands and three peaked energy spectra in the ARPES and inverse photoemission spectra of strongly correlated electron systems, such as the cuprates, are discussed. Shadow bands arise from quasi elastic exchange Bragg scattering from residual antiferromagnetic spin correlations in the paramagnetic phase. Three peaked energy spectra arise as a superposition of the central Landau quasi particle peak of the weakly correlated system and the upper and lower band peaks split by the SDW and/or Mott-Hubbard pseudo gap 2{Delta} of the strongly correlated system. The coexistence of these three resonances is explained in terms of quasi particles propagating in a medium with {Sigma}(k,{omega}) exhibiting strong anomalous dispersion, i.e. multiple fermionic modes for fixed k, analogous to multiple sound modes in superfluid {sup 3}He and {sup 4}He.
- OSTI ID:
- 427047
- Report Number(s):
- CONF-9505186-; CNN: Grant 92-22-682; Grant 5024-501-22; TRN: 96:005768-0042
- Resource Relation:
- Conference: 2. physical phenomena at high magnetic fields conference, Tallahassee, FL (United States), 6-9 May 1995; Other Information: PBD: 1996; Related Information: Is Part Of Proceedings of the physical phenomena at high magnetic fields - II; Fisk, Z.; Gor`kov, L.; Meltzer, D.; Schrieffer, R. [eds.]; PB: 807 p.
- Country of Publication:
- United States
- Language:
- English
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