Thermo-spin effects in a quantum dot connected to ferromagnetic leads

Abstract

We study a system composed of a quantum dot in contact with ferromagnetic leads, held at different temperatures. Spin analogues to the thermopower and thermoelectric figures of merit are defined and studied as a function of junction parameters. It is shown that in contrast to bulk ferromagnets, the spin thermopower coefficient in a junction can be as large as the Seebeck coefficient, resulting in a large spin figure of merit. In addition, it is demonstrated that the junction can be tuned to supply only spin current but no charge current. We also discuss experimental systems where our predictions can be verified.

4 pages, 2 figures, published version (PRB rapid)

References in corpus (20)

• Electronic spin transport and spin precession in single graphene layers at room temperature
• Quantized thermal conductance of dielectric quantum wires
• Thermoelectric effect in molecular electronics
• Thermal conductance through molecular wires
• Thermopower of Single-Molecule Devices
• NRG study of the Kondo effect in the presence of itinerant-electron ferromagnetism
• Optimal thermoelectric figure of merit of a molecular junction
• Electric-field controlled spin reversal in a quantum dot with ferromagnetic contacts
• Theory of non-equilibrium thermoelectric effects in nanoscale junctions
• Solving rate equations for electron tunneling via discrete quantum states
• Length-dependent conductance and thermopower in single-molecule junctions of dithiolated oligophenylene derivatives
• Thermoelectric effects in strongly interacting quantum dot coupled to ferromagnetic leads
• Thermoelectric effect in molecular junctions: A tool for revealing transport mechanisms
• On the Mott formula for thermopower of non-interactions electrons in quantum point contacts
• Interaction-Induced Resonance in Conductance and Thermopower of Quantum Wires
• Kondo Resonance in the Presence of Spin-Polarized Currents
• Thermopower of the Hubbard model: Effects of multiple orbitals and magnetic fields in the atomic limit
• Electronic thermal transport in strongly correlated multilayered nanostructures
• Dynamical thermal response functions for strongly correlated one-dimensional systems
• Spin cloud induced around an elastic scatterer by the intrinsic spin-Hall effect

Cited by in corpus (40)

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• Thermoelectric Effects in Magnetic Nanostructures
• Interplay of Peltier and Seebeck effects in nanoscale nonlocal spin valves
• Onsager Relations in Coupled Electric, Thermoelectric and Spin Transport: The Ten-Fold Way
• Giant thermoelectric effect in Al2O3 magnetic tunnel junctions
• Spin-thermopower in interacting quantum dots
• Thermoelectric properties of an interacting quantum dot-based heat engine
• Thermoelectric transport with electron-phonon coupling and electron-electron interaction in molecular junctions
• Green's function methods for single molecule junctions
• Giant magnetoresistance and spin Seebeck coefficient in zigzag a-graphyne nanoribbons
• Vacancy Effects on Electric and Thermoelectric Properties of Zigzag Silicene Nanoribbons
• Nanoscale Spin Seebeck Rectifier: Controlling Thermal Spin Transport across Insulating Magnetic Junctions with Localized Spin
• Enhanced thermoelectric efficiency in ferromagnetic silicene nanoribbons asymmetrically terminated with hydrogen atoms
• Spin-dependent thermoelectric effects in a strongly correlated double quantum dot
• Thermoelectric study of dissipative quantum dot heat engines
• Thermal engineering in low-dimensional quantum devices: a tutorial review of nonequilibrium Green's function methods
• Spin-dependent thermoelectric effects in transport through a nanoscopic junction involving spin impurity
• Effect of Thermoelectric Cooling in Nanoscale Junctions
• Spin-current Seebeck effect in quantum dot systems
• Thermoelectric spin accumulation and long-time spin precession in a non-collinear quantum dot spin valve
• Spin-resolved electron waiting times in a quantum dot spin valve
• Thermoelectric effects in a double quantum dot system weakly coupled to ferromagnetic leads
• Spin-dependent thermoelectric transport through double quantum dots
• Spin-dependent thermoelectric properties of a Kondo-correlated quantum dot with Rashba spin-orbit coupling
• Anisotropic thermoelectric effect in helimagnetic tunnel junctions
• Spin-dependent heat signatures of single-molecule spin dynamics
• Thermodynamics of energy, charge and spin currents in thermoelectric quantum-dot spin valve
• Time-Dependent Thermopower Effect in an Interacting Quantum Dot
• Negative differential conductance in molecular junctions: an overview of experiment and theory
• Spin Seebeck effect of correlated magnetic molecules
• Spin valve effect in two-dimensional VSe${}_2$ system
• Electron-electron interaction induced spin thermalization in quasi-low-dimensional spin valves
• Magnetization pumping and dynamics in a Dzyaloshinskii-Moriya magnet
• Thermoelectric phenomena in an antiferromagnetic helix: Role of electric field
• Thermoelectric performance of quantum dots embedded in an Aharonov-Bohm ring: a Pauli master equation approach
• Charge and Spin Thermoelectric Transport in Benzene-Based Molecular Nano-Junctions: A Quantum Many-Body Study
• Optimal Single Quantum Dot Heat-to-pure-spin-current Converters
• Thermopower of few-electron quantum dots with Kondo correlations