Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1996-12-07
Phys. Rev. Lett. 78, 3773 (1997)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
9 pages, 3 figures
Scientific paper
10.1103/PhysRevLett.78.3773
The resistivity due to a domain wall in ferromagnetic metallic wire is calculated based on the linear response theory. The interaction between conduction electrons and the wall is expressed in terms of a classical gauge field which is introduced by the local gauge transformation in the electron spin space. It is shown that the wall contributes to the decoherence of electrons and that this quantum correction can dominate over the Boltzmann resisitivity, leading to a decrease of resisitivity by nucleation of a wall. The conductance fluctuation due to the motion of the wall is also investigated. The results are compared with recent experiments.
Fukuyama Hidetoshi
Tatara Gen
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