Magnon cotunneling through a quantum dot

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:441

Article

Karwacki, Lukasz¹ 

[1] Adam Mickiewicz Univ, Fac Phys, Ul Umultowska 85, PL-61614 Poznan, Poland

关键词: Magnons;    Quantum dot;    Spin caloritronics;   

DOI  :  10.1016/j.jmmm.2017.06.088

来源: Elsevier

【 摘 要 】

I consider a single-level quantum dot coupled to two reservoirs of spin waves (magnons). Such systems have been studied recently from the point of view of possible coupling between electronic and magnonic spin currents. However, usually weakly coupled systems were investigated. When coupling between the dot and reservoirs is not weak, then higher order processes play a role and have to be included. Here I consider cotunneling of magnons through a spin-occupied quantum dot, which can be understood as a magnon (spin) leakage current in analogy to leakage currents in charge-based electronics. Particular emphasis has been put on investigating the effect of magnetic field and temperature difference between the magnonic reservoirs. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free