Nuclear magnetic relaxation for the spin-degenerate Anderson model


Autoria(s): Whitaker, M. A.; Oliveira, L. N.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

27/05/2014

27/05/2014

01/05/1991

Resumo

A renormalization-group calculation of the temperature-dependent nuclear spin relaxation rate for a magnetic impurity in a metallic host is reported. The calculation follows a simplified procedure, which produces accurate rates in the low-temperature Fermi-liquid regime, although yielding only qualitatively reliable results at higher temperatures. In all cases considered, as the temperature T diminishes, the rates peak before decaying linearly to zero in the Fermi-liquid range. For T → 0, the results agree very well with Shiba's expression relating the low-temperature coefficient of the relaxation rate to the squared zero-temperature susceptibility. In the Kondo limit, the enhanced susceptibility associated with the Kondo resonance produces a very sharp peak in the relaxation rate near the Kondo temperature. © 1991.

Formato

69-73

Identificador

http://dx.doi.org/10.1016/0921-4526(91)90492-W

Physica B: Physics of Condensed Matter, v. 171, n. 1-4, p. 69-73, 1991.

0921-4526

http://hdl.handle.net/11449/130704

10.1016/0921-4526(91)90492-W

WOS:A1991FU47000010

2-s2.0-0026155011

Idioma(s)

eng

Publicador

Elsevier B.V.

Relação

Physica B: Physics of Condensed Matter

Direitos

closedAccess

Palavras-Chave #Metals and Alloys #Nuclear Magnetic Resonance #Relaxation Processes #Anderson Model #Kondo Temperature #Magnetic Materials
Tipo

info:eu-repo/semantics/article