|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'506'133
Articles rated: 2609
26 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Coqblin-Schrieffer impurity in a singular metal | | Yupeng Wang
; P. Schlottmann
; | | Date: |
11 Sep 2000 | | Journal: | Phys. Rev. B 62, 6877(2000) | | Subject: | Strongly Correlated Electrons | cond-mat.str-el | | Abstract: | A Coqblin-Schrieffer impurity of spin $S$ coupled to the boundary of an open SU(N)-invariant $t-J$ chain with $N = 2S+2$ is studied. The model is integrable as a function of one coupling parameter $v$ for arbitrary spin and band filling. The system is coupled to a reservoir of electrons and as a function of the chemical potential the host chain has a critical point corresponding to the van Hove singularity of the empty band of charges. In the neighborhood of this critical point we study the low temperature properties of the impurity as a function of $v$. For constant chemical potential we obtain two critical coupling values $v_1=-1/2$ and $v_2=0$ separating phases in which the impurity spin is completely compensated (Kondo effect), partially screened (undercompensated impurity) or decoupled from the chain (free spin). The partial compensation occurs as a consequence of a thermally {it activated Kondo effect} in the region $v_1 < v < v_2$. The possible realization of such a {it finite temperature Kondo effect} in narrow-gap semiconductors is discussed. | | Source: | arXiv, cond-mat/0009143 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER