Bulla, R. and Pruschke, Th. and Hewson, A. C. (1997) Anderson impurity in pseudo-gap Fermi systems. JOURNAL OF PHYSICS-CONDENSED MATTER, 9 (47). pp. 10463-10474. ISSN 0953-8984, 1361-648X
Full text not available from this repository.Abstract
We use the numerical renormalization group method to study an Anderson impurity in a conduction band with the density of states varying as rho(omega) proportional to \omega\(r) with r z 0. We find two different fixed points: a local-moment fixed point with the impurity effectively decoupled from the band and a strong-coupling fixed point with a partially screened impurity spin. The specific heat and the spin susceptibility show power-law behaviour with different exponents in the strong-coupling and local-moment regimes. We also calculate the impurity spectral function which diverges (vanishes) with \omega\(-r) (\omega\(r)) in the strong-coupling (local-moment) regime.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | RENORMALIZATION-GROUP APPROACH; DILUTE MAGNETIC-ALLOYS; INFINITE DIMENSIONS; STATIC PROPERTIES; HUBBARD-MODEL; BEHAVIOR |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 02 Mar 2023 07:22 |
| Last Modified: | 02 Mar 2023 07:22 |
| URI: | https://pred.uni-regensburg.de/id/eprint/50399 |
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