Signatures of the Correlated-Hopping Interaction in Non-Linear Transport through a Quantum Dot

Abstract

In condensed matter systems with the Coulomb interaction playing an important role one expects, besides the on-site (local) Hubbard-type interaction, that also other (non-local) terms depending on the site occupancy, known as correlated or assisted hopping, exist. Even though such terms in quantum dots tunnel coupled to external electrodes may have quite an appreciable amplitude, the interpretation of experiments on these systems -- usually in the linear response regime -- seems not to require their presence. However, since the correlated-hopping term breaks the particle-hole symmetry of the standard Anderson model and modifies all transport characteristics of the system, the detailed knowledge of its influence on measurable characteristics, especially {\em in the non-linear regime}, is a prerequisite for its experimental detection. In this paper, we study the non-linear transport properties of junctions composed of a quantum dot tunnel coupled to external electrodes. We model the system by the single-impurity Anderson Hamiltonian with Hubbard on-site interaction and with a non-local correlated-hopping interaction. Using the previously found general expression for the spin-dependent transport and spectral Green functions as well as general formulae for charge and heat transport, we calculate relevant transport characteristics in the strongly non-linear regime

arXiv comment10 pages, 8 figures, 5 pages Suppl. Material; to be published in Ann. Phys. (Berlin)

References in corpus (27)

• From the Kondo Regime to the Mixed-Valence Regime in a Single-Electron Transistor
• Fundamental aspects of steady-state conversion of heat to work at the nanoscale
• The Anderson Model out of Equilibrium: Non-Crossing-Approximation Approach to Transport through a Quantum Dot
• The Addition Spectrum of a Lateral Dot from Coulomb and Spin Blockade Spectroscopy
• The Low-Temperature Fate of the 0.7 Structure in a Point Contact: A Kondo-like Correlated State in an Open System
• Kondo model for the "0.7 anomaly" in transport through a quantum point contact
• Thermoelectric transport through strongly correlated quantum dots
• Thermoelectric efficiency of three-terminal quantum thermal machines
• Performance analysis of an interacting quantum dot thermoelectric system
• Quantum simulation of correlated-hopping models with fermions in optical lattices
• Local and non-local thermopowers in three-terminal nanostructures
• Kondo effect in d-wave superconductors
• Seebeck effect in the graphene-superconductor junction
• Thermoelectric response of a correlated impurity in the nonequilibrium Kondo regime
• Enhancing of nonlinear thermoelectric response of a correlated quantum dot in the Kondo regime by asymmetrically coupling to the leads
• Effect of assisted hopping on thermopower in an interacting quantum dot
• Multi-terminal far-from-equilibrium thermoelectric nano-devices in the Kondo regime
• Interacting second-order topological insulators in one-dimensional fermions with correlated hopping
• Nonequilibrium Seebeck effect and thermoelectric efficiency of Kondo-correlated molecular junctions
• Assisted hopping in the Anderson impurity model: A flow equation study
• Effect of assisted hopping on the formation of local moments in magnetic impurities and quantum dots
• Assisted hopping and interaction effects in impurity models
• The role of correlated hopping in many-body physics of flat-band systems: Nagaoka ferromagnetism
• Charge and heat transport through quantum dots with local and correlated-hopping interactions
• Influence of assisted hopping interaction on the linear conductance of quantum dot
• Four terminal quantum dot as an efficient rectifier of heat and charge currents
• Influence of Correlated Hybridization on the Conductance of Molecular Transistors