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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Closed-Form Weak Localization Magnetoconductivity in Quantum Wells with Arbitrary Rashba and Dresselhaus Spin-Orbit Interactions

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Marinescu, D. C. [1] ; Weigele, Pirmin J. [2] ; Zumbuhl, Dominik M. [2] ; Carlos Egues, J. [3]
Total Authors: 4
[1] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 - USA
[2] Univ Basel, Dept Phys, Klingelbergstr 82, CH-4056 Basel - Switzerland
[3] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Physical Review Letters; v. 122, n. 15 APR 18 2019.
Web of Science Citations: 0

We derive a closed-form expression for the weak localization (WL) corrections to the magneto-conductivity of a 2D electron system with arbitrary Rashba alpha and Dresselhaus beta (linear) and beta(3) (cubic) spin-orbit interaction couplings, in a perpendicular magnetic field geometry. In a system of reference with an in-plane (z) over cap axis chosen as the high spin-symmetry direction at alpha = beta, we formulate a new algorithm to calculate the three independent contributions that lead to WL. The antilocalization is counterbalanced by the term associated with the spin relaxation along (z) over cap, dependent only on alpha - beta. The other term is generated by two identical scattering modes characterized by spin-relaxation rates which are explicit functions of the orientation of the scattered momentum. Excellent agreement is found with data from GaAs quantum wells, where, in particular, our theory correctly captures the shift of the minima of the WL curves as a function of alpha/beta. This suggests that the anisotropy of the effective spin-relaxation rates is fundamental to understanding the effect of the spin-orbit coupling in transport. (AU)

FAPESP's process: 16/50200-4 - Quantum correction to the conductivity of 2D electron gases near the Rashba-Dresselhaus SU(2) sysmmetry point
Grantee:José Carlos Egues de Menezes
Support type: Regular Research Grants
FAPESP's process: 16/08468-0 - Topological insulators and Majorana fermions
Grantee:José Carlos Egues de Menezes
Support type: Regular Research Grants