Anomalous Self-Energy Features in the 2D Hubbard Model

• Authors: A. Avella , F. Mancini
• Languages of publication: EN

Abstracts

EN

The electronic self-energy of the two-dimensional Hubbard model, computed in the non-crossing approximation within the composite operator method, is studied as a function of frequency as well as temperature at the Fermi surface, for a value of doping at which the pseudogap is already well developed. For values of momentum belonging to the phantom arc of the Fermi surface, both dependences show anomalous power law behavior in contrast to that expected from the Fermi liquid theory.

Keywords

EN

71.10.Fd; 71.27.+a; 71.10.-w

Discipline

• 71.10.-w: Theories and models of many-electron systems
• 71.27.+a: Strongly correlated electron systems; heavy fermions
• 71.10.Fd: Lattice fermion models (Hubbard model, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 1
• Pages: 395-398

Dates

published

2008-01

received

2007-07-09

Contributors

author

A. Avella

• Dipartimento di Fisica "E.R. Caianiello" - Unita CNISM di Salerno, Universita degli Studi di Salerno, 84081 Baronissi (SA), Italy

author

F. Mancini

• Dipartimento di Fisica "E.R. Caianiello" - Unita CNISM di Salerno, Universita degli Studi di Salerno, 84081 Baronissi (SA), Italy

References

• 1. A. Avella, F. Mancini, Phys. Rev. B 75, 134518 (2007)
• 2. J. Bosse, W. Götze, M. Lűcke, Phys. Rev. A 17, 434 (1978)
• 3. F. Mancini, A. Avella, Adv. Phys. 53, 537 (2004)
• 4. A. Avella, F. Mancini, V. Turkowski, Phys. Rev. B 67, 115123 (2003)

Identifiers

DOI

10.12693/APhysPolA.113.395