Restrictions on modeling spin injection by resistor networks
Emmanuel I. Rashba
TL;DR
This paper examines the limitations of resistor network models in simulating spin injection, highlighting issues arising from inhomogeneous spin populations and comparing these models with analytical solutions.
Contribution
It provides a critical analysis of resistor network models for spin transport, identifying their core limitations in representing inhomogeneous spin populations.
Findings
Resistor network models have limitations in inhomogeneous systems.
Analytical solutions reveal issues not captured by resistor models.
The study clarifies when resistor models are applicable or insufficient.
Abstract
Because of the technical difficulties of solving spin transport equations in inhomogeneous systems, different resistor networks are widely applied for modeling spin transport. By comparing an analytical solution for spin injection across a ferromagnet - paramagnet junction with a resistor model approach, its essential limitations stemming from inhomogeneous spin populations are clarified.
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