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|Title:||Tunable magnetic flux sensor using a metallic Rashba ring with half-metal electrodes||Authors:||Chen, J.
|Issue Date:||1-Apr-2011||Citation:||Chen, J., Jalil, M.B.A., Tan, S.G. (2011-04-01). Tunable magnetic flux sensor using a metallic Rashba ring with half-metal electrodes. Journal of Applied Physics 109 (7) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.3560045||Abstract:||We propose a magnetic field sensor consisting of a square ring made of metal with a strong Rashba spin-orbital coupling (RSOC) and contacted to half-metal electrodes. Due to the Aharonov-Casher effect, the presence of the RSOC imparts a spin-dependent geometric phase to conduction electrons in the ring. The combination of the magnetic flux emanating from the magnetic sample placed below the ring, and the Aharonov-Casher effect due to RSOC results in spin interference, which modulates the spin transport in the ring nanostructure. By using the tight-binding nonequilibrium Green's function formalism to model the transport across the nanoring detector, we theoretically show that with proper optimization, the Rashba ring can function as a sensitive and tunable magnetic probe to detect magnetic flux. © 2011 American Institute of Physics.||Source Title:||Journal of Applied Physics||URI:||http://scholarbank.nus.edu.sg/handle/10635/72091||ISSN:||00218979||DOI:||10.1063/1.3560045|
|Appears in Collections:||Staff Publications|
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