磁电阻
材料科学
凝聚态物理
物理
自旋(空气动力学)
磁矩
算法
结晶学
磁场
计算机科学
化学
热力学
量子力学
作者
Nayana Devaraj,Kartick Tarafder
出处
期刊:Physical review
日期:2021-04-09
卷期号:103 (16)
被引量:7
标识
DOI:10.1103/physrevb.103.165407
摘要
We demonstrate a large magnetoresistance (MR) in a $\mathrm{Co}/\mathrm{Mo}{\mathrm{S}}_{2}/\mathrm{graphene}/\mathrm{Mo}{\mathrm{S}}_{2}/\mathrm{Co}$ magnetic tunnel junction by means of ab initio transport calculations. A Co electrode turns out to be an excellent spin injector for a $\mathrm{Mo}{\mathrm{S}}_{2}/\mathrm{graphene}/\mathrm{Mo}{\mathrm{S}}_{2}$ barrier. The transmission spectrum, current-voltage characteristics, spin injection efficiency, and magnetoresistance are calculated for the modeled device at various bias voltages in the parallel and antiparallel magnetic configurations. A remarkable change in the transmission spectrum and a subsequent change in total current through the junction have been observed, when the relative magnetic orientations of the electrodes are altered. The huge change in current due to the change in the relative magnetic orientation of the Co electrodes produces a high magnetoresistance up to $1270%$. The obtained values of the device parameters clearly indicate that a $\mathrm{Mo}{\mathrm{S}}_{2}/\mathrm{graphene}/\mathrm{Mo}{\mathrm{S}}_{2}$ heterostructure would be an excellent compound for highly efficient spin-valve device applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI