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Dynamical impurity spin susceptibility in metals

Dynamical impurity spin susceptibility in metals The longitudinal and transverse impurity spin susceptibilities are expressed exactly in terms of holomorphic self-energies. Within thes-d model these self-energies are calculated in lowest order perturbation theory thus yielding reasonable approximations for the susceptibilities valid for all temperatures and magnetic fields above the Kondo regime and in the whole frequency domain including the hydrodynamical one. The transverse susceptibility and the longitudinal nuclear spin susceptibility are found to be satisfactorily described by Bloch's equations. In the low-temperature regime the longitudinal relaxation timeT 1 exhibits a nontrivial spin and temperature dependence. At low temperatures and high fields the longitudinal localized electron spin susceptibility is found to show a non-Lorentzian double-peak line shape which cannot be described by Bloch's equations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

Dynamical impurity spin susceptibility in metals

Journal of Low Temperature Physics , Volume 5 (5) – Oct 27, 2004

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References (13)

Publisher
Springer Journals
Copyright
Copyright
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/BF00628186
Publisher site
See Article on Publisher Site

Abstract

The longitudinal and transverse impurity spin susceptibilities are expressed exactly in terms of holomorphic self-energies. Within thes-d model these self-energies are calculated in lowest order perturbation theory thus yielding reasonable approximations for the susceptibilities valid for all temperatures and magnetic fields above the Kondo regime and in the whole frequency domain including the hydrodynamical one. The transverse susceptibility and the longitudinal nuclear spin susceptibility are found to be satisfactorily described by Bloch's equations. In the low-temperature regime the longitudinal relaxation timeT 1 exhibits a nontrivial spin and temperature dependence. At low temperatures and high fields the longitudinal localized electron spin susceptibility is found to show a non-Lorentzian double-peak line shape which cannot be described by Bloch's equations.

Journal

Journal of Low Temperature PhysicsSpringer Journals

Published: Oct 27, 2004

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