Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-10-09
Physical Review B 74, 224429 (2006)
Physics
Condensed Matter
Strongly Correlated Electrons
13 pages, 6 figures
Scientific paper
10.1103/PhysRevB.74.224429
The transmission of correlated electrons through a domain wall in a ferromagnetic one dimensional system is studied theoretically in the limit of a domain wall width smaller or comparable to the electron Fermi wavelength. The domain wall gives rise to both potential and spin dependent scattering of the charge carriers. Using a poor man's renormalization group approach for the electron-electron interactions, we obtain the low temperature behavior of the reflection and transmission coefficients. The results show that the low-temperature conductance is governed by the electron correlations, which may suppress charge transport without suppressing spin current. The results may account for a huge magnetoresistance associated with a domain wall in ballistic nanocontacs.
Araujo M. A. N.
Barnas Jozef
Berakdar Jamal
Dugaev Vitalii K.
Vieira Vitor Rocha
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