Dephasing-Assisted Macrospin Transport

Stefano Iubini, Simone Borlenghi, Anna Delin, Stefano Lepri, Francesco Piazza
2020 Entropy  
Transport phenomena are ubiquitous in physics, and it is generally understood that the environmental disorder and noise deteriorates the transfer of excitations. There are, however, cases in which transport can be enhanced by fluctuations. In the present work, we show, by means of micromagnetics simulations, that transport efficiency in a chain of classical macrospins can be greatly increased by an optimal level of dephasing noise. We also demonstrate the same effect in a simplified model, the
more » ... issipative Discrete Nonlinear Schrödinger equation, subject to phase noise. Our results point towards the realization of a large class of magnonics and spintronics devices, where disorder and noise can be used to enhance spin-dependent transport efficiency.
doi:10.3390/e22020210 pmid:33285985 fatcat:6e5ciadw5vew3nfstwam2e44ha