Volume 95, Number 5, September 2011
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||24 August 2011|
Magneto-transport in a mesoscopic ring with Rashba and Dresselhaus spin-orbit interactions
Theoretical Condensed Matter Physics Division, Saha Institute of Nuclear Physics - Sector-I, Block-AF, Bidhannagar, Kolkata-700 064, India
2 Department of Physics, Narasinha Dutt College - 129 Belilious Road, Howrah-711 101, India
3 Department of Physics, Visva-Bharati - Santiniketan, West Bengal-731 235, India
4 Department of Physics, University of Kalyani - Kalyani, West Bengal-741 235, India
Accepted: 21 July 2011
Electronic transport in a one-dimensional mesoscopic ring threaded by a magnetic flux is studied in the presence of Rashba and Dresselhaus spin-orbit interactions. A completely analytical technique within a tight-binding formalism unveils the spin-split bands in the presence of the spin-orbit interactions and leads to a method of determining the strength of the Dresselhaus interaction. In addition to this, the persistent currents for ordered and disordered rings have been investigated numerically. It is observed that the presence of the spin-orbit interaction, in general, leads to an enhanced amplitude of the persistent current. Numerical results corroborate the respective analytical findings.
PACS: 73.23.-b – Electronic transport in mesoscopic systems / 73.23.Ra – Persistent currents / 73.21.Hb – Quantum wires
© EPLA, 2011
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