Nonlinear electric and thermoelectric Andreev transport through a hybrid quantum dot coupled to ferromagnetic and superconducting leads
arXiv:1708.02451 · doi:10.1140/epjb/e2017-80242-1
Abstract
We discuss the nonlinear Andreev current of an interacting quantum dot coupled to spin-polarized and superconducting reservoirs when voltage and temperature biases are applied across the nanostructure. Due to the particle-hole symmetry introduced by the superconducting (S) lead, the subgap spin current vanishes identically. Nevertheless, the Andreev charge current depends on the degree of polarization in the ferromagnetic (F) contact since the shift of electrostatic internal potential of the conductor depends on spin orientation of the charge carrier. This spin-dependent potential shift characterizes nonlinear responses in our device. We show how the subgap current versus the bias voltage or temperature difference depends on the lead polarization in two cases, namely (i) S-dominant case, when the dot-superconductor tunneling rate () is much higher than the ferromagnet-dot tunnel coupling (), and (ii) F-dominant case, when . For the ferromagnetic dominant case the spin-dependent potential shows a nonmonotonic behavior as the dot level is detuned. Thus the subgap current can also exhibit interesting behaviors such as current rectification and the maximization of thermocurrents with smaller thermal biases when the lead polarization and the quantum dot level are adjusted.
arXiv comment8 pages, 4 figures
References in corpus (45)
- Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
- Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
- Helical liquids and Majorana bound states in quantum wires
- A generic new platform for topological quantum computation using semiconductor heterostructures
- Spin-resolved Andreev levels and parity crossings in hybrid superconductor-semiconductor nanostructures
- Carbon Nanotubes as Cooper Pair Beam Splitters
- Revealing the electronic structure of a carbon nanotube carrying a supercurrent
- NRG study of the Kondo effect in the presence of itinerant-electron ferromagnetism
- Nonlocal Thermoelectric Effects and Nonlocal Onsager Relations in a Three-Terminal Proximity-Coupled Superconductor-Ferromagnet Device
- Huge thermoelectric effects in ferromagnet-superconductor junctions in the presence of a spin-splitting field
- Kondo effect in a quantum dot coupled to ferromagnetic leads: A numerical renormalization group analysis
- Scattering theory of nonlinear thermoelectric transport
- Resonant Andreev Tunneling in Strongly Interacting Quantum Dots
- Observation of thermoelectric currents in high-field superconductor-ferromagnet tunnel junctions
- Kondo effect in Normal-Superconductor Quantum Dots
- Shiba states and zero-bias anomalies in the hybrid normal-superconductor Anderson model
- Nonlinear thermovoltage and thermocurrent in quantum dots
- Andreev Scattering and the Kondo Effect
- Non-local spectroscopy of Andreev bound states
- Nonlinear heat transport in mesoscopic conductors: Rectification, Peltier effect and Wiedemann-Franz law
- Numerical Renormalization Group Approach to a Quantum Dot Coupled to Normal and Superconducting Leads
- Andreev tunnelling in quantum dots: A slave-boson approach
- Ferromagnetic insulator-based superconducting junctions as sensitive electron thermometers
- Nonequilibrium theory of Coulomb blockade in open quantum dots
- Giant thermoelectric effects in a proximity-coupled superconductor-ferromagnet device
- Tunneling through an Anderson impurity between superconductors
- Nonlinear phenomena in quantum thermoelectrics and heat
- Spin-dependent Andreev reflection tunneling through a quantum dot with intradot spin-flip scattering
- Quantum Dot coupled to a normal and a superconducting lead
- Proposal for a phase-coherent thermoelectric transistor
- Spin-resolved Andreev transport through double-quantum-dot Cooper pair splitters
- Large thermoelectric power and figure of merit in a ferromagnetic-quantum dot-superconducting device
- Kondo-resonance, Coulomb blockade, and Andreev transport through a quantum dot
- Spin-polarized Andreev transport influenced by Coulomb repulsion through two quantum dot system
- Spin caloritronics with superconductors: Enhanced thermoelectric effects, generalized Onsager response-matrix, and thermal spin currents
- Coherent Thermoelectric Effects in Mesoscopic Andreev Interferometers
- Spin-dependent thermoelectric phenomena in a quantum dot attached to ferromagnetic and superconducting electrodes
- Cross thermoelectric coupling in normal-superconductor quantum dots
- The charge and low-frequency response of normal-superconducting heterostructures
- Fluctuation Relations for Spintronics
- Electron-hole imbalance and large thermoelectric effect in superconducting hybrids with spin-active interfaces
- A hybrid superconducting quantum dot acting as an efficient charge and spin Seebeck diode
- Generation of pure spin currents by superconducting proximity effect in quantum dots
- Novel non-local effects in three-terminal hybrid devices with quantum dot
- Enhancement of thermoelectric effect in diffusive superconducting bilayers with magnetic interfaces