# Mesoscopics in Spintronics: Quantum Interference Effects in Spin-Polarized Electron Transport

Source: [Mesoscopics in Spintronics: Quantum Interference Effects in Spin-Polarized Electron Transport](<https://www.sota2.com/research/paper/68fa1e3d7a2b558e29321125>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-23T14:34:19.135Z

Authors: Branislav K. Nikolic, J. K. Freericks

Published: 2001-11-08T20:30:01.000Z

## Abstract

We generalize a Landauer-type formula, using a real$\\otimes$spin-space Green function technique, to treat spin-dependent transport in quantum-coherent conductors attached to two ferromagnetic contacts. The formalism is employed to study the properties of components of an exact zero-temperature conductance matrix ${\\bf G}$, as well as their mesoscopic fluctuations, describing injection and detection of a spin-polarized current in a two-dimensional system where electrons exhibit an interplay between Rashba spin-orbit (SO) coupling and phase-coherent propagation through a disordered medium. Strong Rashba coupling leads to a dramatic reduction of localization effects on the conductances and their fluctuations, whose features depend on the spin-polarization of injected electrons. In the limit of weak Rashba interaction antilocalization vanishes (i.e., the sum of the matrix elements of ${\\bf G}$ is almost independent of the SO coupling), but the partial spin-resolved conductances can still be non-zero. Besides spin-resolved conductance fluctuations and antilocalization, unusual quantum interference effects are revealed in this system leading to a negative difference between the partial conductances for a parallel and an antiparallel orientation of the contact magnetization, in a range of disorder strengths and for a particular spin-polarization of incoming electron with respect to the direction of Rashba electric field.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/cond-mat/0111144>)

[PDF](<https://arxiv.org/pdf/cond-mat/0111144.pdf>)