Electron-electron interaction effects in magnetic layered structures
Chernovtsy Department of the Institute of Materials Science
Vilde 5, 58001 Chernovtsy, Ukraine
2 Department of Physics, A. M. University ul. Umultowska 85, 61-614 Poznań, Poland and Institute of Molecular Physics, Polish Academy of Sciences ul. M. Smoluchowskiego 17, 60-179 Poznań, Poland
Accepted: 26 January 2001
We consider some peculiarities of the logarithmic electron-electron interaction corrections to conductivity, which can arise in magnetic quantum wells due to spin-splitting of energy levels. The matrix elements of Coulomb interaction include different screening contributions from spin-up and spin-down electrons, which can lead to anomalous behavior of the interaction constant when the width of a spin quantum well is changed. Our results explain qualitatively the physical origin of the recently observed anomalous behavior of the logarithmic term in electrical resistivity of Co/Cr/Ag/Co layered structures (Aliev F. G. et al., Phys. Rev. Lett., 78 (1997) 134).
PACS: 75.70.-i – Magnetic properties of thin films, surfaces and interfaces / 75.70.Cn – Interfacial magnetic properties (multilayers) / 73.20.Fz – Weak or Anderson localization
© EDP Sciences, 2001