Maier, Thomas and Jarrell, M. and Pruschke, T. and Keller, Joachim (2000) A non-crossing approximation for the study of intersite correlations. EUROPEAN PHYSICAL JOURNAL B, 13 (4). pp. 613-624. ISSN 1434-6028
Full text not available from this repository.Abstract
We develop a Non-Crossing: Approximation (NCA) for the effective cluster problem of the recently developed Dynamical Cluster Approximation (DCA). The DCA technique includes short-ranged correlations by mapping the lattice problem onto a self-consistently embedded periodic cluster of size N-c. It is a fully causal and systematic approximation to the full lattice problem, with corrections O(1/N-c) in two dimensions. The NCA we develop is a systematic approximation with corrections O(1/N-c(3)). The method will be discussed in detail and results for the one-particle properties of the Hubbard model are shown. Near half filling, the spectra display pronounced features including a pseudogap and non-Fermi-liquid behavior due to short-ranged antiferromagnetic correlations.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FALICOV-KIMBALL MODEL; MEAN-FIELD THEORY; T-J MODEL; HUBBARD-MODEL; INFINITE DIMENSIONS; FERMIONS; LATTICE; SUPERCONDUCTORS |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Alumni or Retired Professors > Group Joachim Keller |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 31 May 2022 09:02 |
| Last Modified: | 31 May 2022 09:02 |
| URI: | https://pred.uni-regensburg.de/id/eprint/42848 |
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