Tunable strength saddle-point contacts impact on quantum rings transmission

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• 作者：J.J. Gonzá ; lez ^{jjgonzalez@fisica.uh.cu" class="auth_mail" title="E-mail the corresponding author} ; L. Diago-Cisneros ; ^{ldiago@fisica.uh.cu" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Electron tunneling ; Transfer matrix ; Scattering matrix ; Spin transitions ; Quantum ring
• 刊名：Physica E: Low-dimensional Systems and Nanostructures
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：83
• 期：Complete
• 页码：30-35
• 全文大小：1305 K

文摘

A particular subject of investigation is the role of several sadle-point contact (QPC) parameters on the scattering properties of an Aharonov–Bohm–Aharonov–Casher quantum ring (QR) under Rashba-type spin orbit interaction. We discuss the interplay of the conductance with the confinement strengths and height of the QPC, which yields new and tunable harmonic and non-harmonics patterns, while one manipulates these constriction parameters. This phenomenology may be of utility to implement a novel way to modulate spin interference effects in semiconducting QRs, providing an appealing test-platform for spintronics applications.