Premium
Impurity spin dynamics and quantum coherence in mesoscopic rings
Author(s) -
Schwab P.,
Eckern U.
Publication year - 1996
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.2065080106
Subject(s) - mesoscopic physics , condensed matter physics , coherence (philosophical gambling strategy) , physics , impurity , spin (aerodynamics) , persistent current , magnetic impurity , kondo effect , spin engineering , spin current , relaxation (psychology) , quantum , spin polarization , quantum mechanics , superconductivity , electron , thermodynamics , psychology , social psychology
We investigate the effects of impurity spin dynamics on quantum coherence in mesoscopic metallic rings. Spin relaxation induces temporal current fluctuations which are closely related to persistent currents in such systems. The persistent current is suppressed in the presence of magnetic impurities. We discuss spin‐polarisation effects, spin‐glass ordering, and the Kondo effect which are shown to restore the current even in the presence of magnetic scattering.