A proposal for the measurement of Rashba and Dresselhaus spin-orbit interaction strengths in a single sample

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• 作者：Santanu K. Maiti^a ; ^{santanu@post.tau.ac.il} ; Shreekantha Sil^b ; Arunava Chakrabarti^c
• 关键词：Rashba spin&ndash ; orbit interaction ; Dresselhaus spin&ndash ; orbit interaction ; Persistent spin current ; Mesoscopic ring
• 刊名：Physics Letters A
• 出版年：2012
• 期刊代码：57_03759601
• 类别：ph
• 出版时间：18 June, 2012
• 卷：376
• 期：30-31
• 页码：2147-2150
• 文件大小：164 K

摘要

We establish an exact analytical treatment for the determination of the strengths of the Rashba and Dresselhaus spin-orbit interactions in a single sample by measuring persistent spin current. A hidden symmetry is exploited in the Hamiltonian to show that the spin current vanishes when the strength of the Dresselhaus interaction becomes equal to the strength of the Rashba term. The results are sustained even in the presence of disorder and thus an experiment in this regard will be challenging.