Carrier-mediated exchange coupling and Fermi surface topology

Wen Min Huang*, Hsin Hua Lai, Cheng-Hung Chang, Hsiu Hau Lin

*此作品的通信作者

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

We investigate the carrier-mediated exchange coupling between two ferromagnets, sandwiching an intermediate thin layer with Rashba interaction. The effective exchange coupling is obtained by integrating out the itinerant carriers. It turns out that the magnetic trends depend sensitively upon the topology of the Fermi surface. As the topology changes from "wedding cake" to "donut", the mediated exchange goes from the oscillatory Ruderman-Kittel-Kasuya-Yosida to the non-collinear spiral interactions accordingly. It is rather surprising that the Fermi surface topology determines which type of magnetic interaction becomes dominant. Finally, we also discuss potential applications for carrier-mediated exchange coupling across the junction.

原文English
頁(從 - 到)88-93
頁數6
期刊International Journal of Modern Physics B
22
發行號1-2
DOIs
出版狀態Published - 20 一月 2008

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