Rashba effect induced localization in quantum networks
Dario Bercioux (1), Michele Governale (2), Vittorio Cataudella (1),, Vincenzo Marigliano Ramaglia (1) ((1)Coherentia-INFM, Dipartimento di, Scienze Fisiche Universit\`a degli studi ``Federico II'', Napoli, Italy, (2)NEST-INFM, Scuola Normale Superiore, Pisa, Italy)
TL;DR
This paper investigates how Rashba spin-orbit coupling in a one-dimensional quantum network causes electron localization similar to magnetic field effects, affecting spectral and transport properties.
Contribution
It introduces a novel localization mechanism induced by Rashba effect in quantum networks, analyzing spectral, transport, and disorder effects.
Findings
Rashba effect causes electron localization in quantum chains.
Localization resembles magnetic field induced phenomena.
Disorder impacts transport properties significantly.
Abstract
We study a quantum network extending in one-dimension (chain of square loops connected at one vertex) made up of quantum wires with Rashba spin-orbit coupling. We show that the Rashba effect may give rise to an electron localization phenomenon similar to the one induced by magnetic field. This localization effect can be attributed to the spin precession due to the Rashba effect. We present results both for the spectral properties of the infinite chain, and for linear transport through a finite-size chain connected to leads. Furthermore, we study the effect of disorder on the transport properties of this network.
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