The Coherent Transport Properties of Electrons in a 4-Terminal Nano Device with Rashba Spin-Orbit Coupling in the Presence of Magnetic Field

Abstract:

We investigate the coherent transport properties of electrons in a side terminal of a four-terminal nano device made of quantum wires with Rashba spin-orbit (SO) coupling in the presence of magnetic filed. We numerically calculate the charge and spin conductances dependent on SO coupling strength and reduced flux. The results imply that the coherent transport in this device is determined by the interplay of Rashba SO coupling and magnetic filed. For specific values of magnetic flux and SO coupling strength, a complete blocking can take place. It also shows that there is a de-blocking phenomenon induced by the interplay of magnetic flux and SO coupling. Such a 4-terminal and multi-channel structure may provide more options of controlling methods for the coherent charge and spin transport.

• Periodical: Advanced Materials Research (Volume 496)
• Pages: 175-180
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.496.175
• Online since: March 2012
• Authors: Hui Xian Wang, Li Ben Li, Da Wei Kang, Hui Hui Liu
• Keywords: AB Phase, Coherent Transport, De-Blocking Phenomenon, Rashba Spin-Orbit Coupling

References

[1] Y. Aharonov, D. Bohm, Phys. Rev. 115 (1959) 485.

[2] Y. Aharonov and A. Casher, Phys. Rev. Lett. 53 (1984) 319.

[3] D. Bercioux, M. Governale, V. Cataudella and V. M. Ramaglia, Phys. Rev. Lett. 93 (2004) 056802.

[4] D. Bercioux, M. Governale, V. Cataudella and V. M. Ramaglia, Phys. Rev. B 72 (2005) 075305.

[5] M. Dey, S. K. Maiti, and S. N. Karmakar, J. Appl. Phys. 109 (2011) 024304.

[6] J. Nitta, T. Akazaki, H. Takayanagi, and T. Enoki, Phys. Rev. Lett. 78 (1997) 1335.

[7] M., Phys. Rev. Lett. 57 (1986) 1761.

[8] D. Grundler, Phys. Rev. Lett. 84 (2000) 6074.