de-la-Peña Sebastián, Schlitz Richard, Vélez Saül, Cuevas Juan Carlos, Kamra Akashdeep
Condensed Matter Physics Center (IFIMAC), Instituto 'Nicolás Cabrera' and Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain.
Department of Materials, ETH Zürich, 8093 Zürich, Switzerland.
J Phys Condens Matter. 2022 May 19;34(29). doi: 10.1088/1361-648X/ac6d9a.
Electrically injected and detected nonlocal magnon transport has emerged as a versatile method for transporting spin as well as probing the spin excitations in a magnetic insulator. We examine the role of drift currents in this phenomenon as a method for controlling the magnon propagation length. Formulating a phenomenological description, we identify the essential requirements for existence of magnon drift. Guided by this insight, we examine magnetic field gradient, asymmetric contribution to dispersion, and temperature gradient as three representative mechanisms underlying a finite magnon drift velocity, finding temperature gradient to be particularly effective.
电注入和检测的非局域磁振子输运已成为一种用于输运自旋以及探测磁绝缘体中自旋激发的通用方法。我们研究了漂移电流在该现象中的作用，将其作为一种控制磁振子传播长度的方法。通过建立一种唯象描述，我们确定了磁振子漂移存在的基本要求。基于这一见解，我们研究了磁场梯度、对色散的不对称贡献以及温度梯度，将其作为有限磁振子漂移速度背后的三种代表性机制，发现温度梯度特别有效。
