4.6 Article

Selective spin transmission through a driven quantum system: A new prescription

Journal

JOURNAL OF APPLIED PHYSICS
Volume 129, Issue 12, Pages -

Publisher

AIP Publishing
DOI: 10.1063/5.0045566

Keywords

-

Funding

  1. Science and Engineering Research Board, Department of Science and Technology, Government of India [EMR/2017/000504]

Ask authors/readers for more resources

A new proposal for spin selective transmission is presented in this work, where spin-dependent transport is externally regulated by irradiating a quantum ring bridging contact electrodes. Precise dependencies of light irradiation, SO coupling, magnetic flux threaded by the ring, interface sensitivity, system temperature, and impurities on spin polarization are critically investigated, providing a potential platform for spin selective electron transmission and application to other complex nano-structured materials.
Several proposals are available to get selective spin transmission through different nano-junctions and in all the cases the regulation is done either by applying a magnetic field or by tuning spin-orbit (SO) coupling. In the present work, we explore a separate scheme where the spin-dependent transport is regulated externally by irradiating a quantum ring that bridges the contact electrodes. This is a new proposal of generating spin selective transmission through a nano-junction, to the best of our knowledge. A high degree of spin polarization along with its phase alteration can be achieved by suitably adjusting the irradiation, circumventing the regulation of magnetic field and/or SO coupling. The effect of irradiation is included through the well-known Floquet-Bloch ansatz, where all the spin-dependent transport phenomena are worked out using Green's function formalism following the Landauer-Buttiker prescription within a tight-binding framework. Precise dependencies of light irradiation, SO coupling, magnetic flux threaded by the ring, interface sensitivity, system temperature, and impurities on spin polarization are critically investigated. Our analysis may give a new platform for spin selective electron transmission and make it applicable to other complex nano-structured materials also. We strongly believe that the present proposal can be examined in a suitable laboratory.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available