Finite-temperature conductance signatures of quantum criticality in double quantum dots

Abstract

We study the linear conductance through a double-quantum-dot system consisting of an interacting dot in its Kondo regime and an effectively noninteracting dot, connected in parallel to metallic leads. Signatures in the zero-bias conductance at temperatures $T>0$ mark a pair of quantum (T=0) phase transitions between a Kondo-screened many-body ground state and non-Kondo ground states. Notably, the conductance features become more prominent with increasing $T$, which enhances the experimental prospects for accessing the quantum-critical region through tuning of gate voltages in a single device.

arXiv comment4 pages, 3 figures, published in PRB

References in corpus (29)

• Kondo Physics in a Single Electron Transistor
• The numerical renormalization group method for quantum impurity systems
• Continuous Quantum Phase Transitions
• Order and quantum phase transitions in the cuprate superconductors
• Observation of the two-channel Kondo effect
• Tunable Non-local Spin Control in a Coupled Quantum Dot System
• Quantum phase transition in a single-molecule quantum dot
• Dissipation effects on the superconductor-insulator transition in 2-D superconductors
• Renormalization-group study of Anderson and Kondo impurities in gapless Fermi systems
• Transition between Quantum States in a Parallel-Coupled Double-Quantum-Dot
• Impurity Quantum Phase Transitions
• Strongly correlated regimes in a double quantum-dot device
• Anderson impurity in pseudo-gap Fermi systems
• Quantum Phase Transition in a Multi-Level Dot
• Transmission Phase Shift of a Quantum Dot with Kondo Correlations
• Phase transitions in the pseudogap Anderson and Kondo models: Critical dimensions, renormalization group, and local-moment criticality
• Anti-Kondo resonance in transport through a quantum wire with a side-coupled quantum dot
• Quantum criticality in a double quantum-dot system
• Quantum phase transition in capacitively coupled double quantum dots
• Zero-field Kondo splitting and quantum-critical transition in double quantum dots
• Quantum phase transition in a two-channel-Kondo quantum dot device
• Probing the Kondo density of states in a three-terminal quantum ring
• Kondo effect of impurity moments in d-wave superconductors: Quantum phase transition and spectral properties
• Enhanced Conductance Through Side-Coupled Double Quantum Dots
• Quantum phase transitions in the systems of parallel quantum dots
• Interference Effects in the Conductance of Multi-Level Quantum Dots
• Kondo Effect in a Many-Electron Quantum Ring
• Kondo and Dicke effect in quantum-dots side coupled to a quantum wire
• Transport Spectroscopy of a Kondo quantum dot coupled to a finite size grain

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• Universality and the zero-bias conductance of the single-electron transistor
• Universal zero-bias conductance for the single electron transistor. II: Comparison with numerical results
• Perfect spin polarization in T-shaped double quantum dots due to the spin-dependent Fano effect
• Spin-polarized conductance in double quantum dots: Interplay of Kondo, Zeeman and interference effects
• Tunable pseudogap Kondo effect and quantum phase transitions in Aharonov-Bohm interferometers
• Gates controlled parallel-coupled double quantum dot on both single layer and bilayer graphene
• Universal zero-bias conductance through a quantum wire side-coupled to a quantum dot
• Symmetry-protected coherent transport for diluted vacancies and adatoms in graphene
• Signatures of quantum phase transitions in parallel quantum dots: Crossover from local-moment to underscreened spin-1 Kondo physics
• Validity of the local self-energy approximation: Application to coupled quantum impurities
• Quantum phase transitions in a pseudogap Anderson-Holstein model
• Conductance and Kondo Interference beyond Proportional Coupling
• Entanglement Entropy Near Kondo-Destruction Quantum Critical Points
• Nonequilibrium transport properties of a double quantum dot in the Kondo regime
• The RKKY Interaction and the Nature of the Ground State of Double Dots in Parallel
• Phase Diagram of Metal-Insulator Transition in System with Anderson-Hubbard Centers
• Exact diagonalization study of double quantum dots in parallel geometry in zero-bandwidth limit