Quantum dot as spin current generator and energy harvester

Open Access
Regular Article

Abstract

The thermoelectric transport in the device composed of a central nanoscopic system in contact with two electrodes and subject to the external magnetic field of Zeeman type has been studied. The device can support pure spin current in the electrodes and may serve as a source of the temperature induced spin currents with possible applications in spintronics. The system may also be used as an energy harvester. We calculate its thermodynamic efficiency η and the power output P. The maximal efficiency of the device reaches the Carnot value when the device works reversibly but with the vanishing power. The interactions between carriers diminish the maximal efficiency of the device, which under the constant load drops well below the Carnot limit but may exceed the Curzon-Ahlborn limit. While the effect of intradot Coulomb repulsion on η depends on the parameters, the interdot/interlevel interaction strongly diminishes the device efficiency.

Keywords

Mesoscopic and Nanoscale Systems 

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Copyright information

© The Author(s) 2015

Authors and Affiliations

  1. 1.Institute of PhysicsM. Curie-Skłodowska UniversityLublinPoland

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