Influence of spin waves on transport through a quantum-dot spin valve

Article

关键词: ZERO-BIAS ANOMALIES;    FERROMAGNETIC LEADS;    MESOSCOPIC CONDUCTORS;    SHOT-NOISE;    SPECTRUM;   

DOI  :  10.1103/PhysRevB.82.205314

来源: SCIE

【 摘 要 】

We study the influence of spin waves on transport through a single-level quantum dot weakly coupled to ferromagnetic electrodes with noncollinear magnetizations. Side peaks appear in the differential conductance due to emission and absorption of spin waves. We, furthermore, investigate the nonequilibrium magnon distributions generated in the source and drain lead. In addition, we show how magnon-assisted tunneling can generate a fully spin-polarized current without an applied transport voltage. We discuss the influence of spin waves on the current noise. Finally, we show how the magnonic contributions to the exchange field can be detected in the finite-frequency Fano factor.

【 授权许可】

Free