Cotunneling-mediated transport through excited states in the Coulomb blockade regime

Abstract

We present finite bias transport measurements on a few-electron quantum dot. In the Coulomb blockade regime, strong signatures of inelastic cotunneling occur which can directly be assigned to excited states observed in the non-blockaded regime. In addition, we observe structures related to sequential tunneling through the dot, occuring after it has been excited by an inelastic cotunneling process. We explain our findings using transport calculations within the real-time Green's function approach, including diagrams up to fourth order in the tunneling matrix elements.

arXiv comment4 pages, 3 figures

References in corpus (7)

• Kondo physics in carbon nanotubes
• Mesoscopic quantum transport: Resonant tunneling in the presence of strong Coulomb interaction
• Electron Cotunneling in a Semiconductor Quantum Dot
• Multi-wall carbon nanotubes as quantum dots
• Transport through a double quantum dot in the sequential- and co- tunneling regimes
• Mesoscopic Fluctuations of Elastic Cotunneling in Coulomb Blockaded Quantum Dots
• In-plane gate single-electron transistor in Ga[Al]As fabricated by scanning probe lithography

Cited by in corpus (37)

• Exact dynamics of dissipative electronic systems and quantum transport: Hierarchical equations of motion approach
• Kinetic Equations for Transport Through Single-Molecule Transistors
• Electrical manipulation of spin states in a single electrostatically gated transition-metal complex
• Electron counting in quantum dots
• Density-operator approaches to transport through interacting quantum dots: Simplifications in fourth-order perturbation theory
• Charge transport through single molecules, quantum dots, and quantum wires
• Pumping of vibrational excitations in a Coulomb blockaded suspended carbon nanotube
• Probing level renormalization by sequential transport through double quantum dots
• Phase coherence in the inelastic cotunneling regime
• Green function techniques in the treatment of quantum transport at the molecular scale
• Coherent probing of excited quantum dot states in an interferometer
• Time-dependent quantum transport: causal superfermions, exact fermion-parity protected decay mode, and Pauli exclusion principle for mixed quantum states
• Full counting statistics and shot noise of cotunneling in quantum dots and single-molecule transistors
• Geometrical effects and signal delay in time-dependent transport at the nanoscale
• Pair-tunneling resonance in the single-electron transport regime
• Graphene quantum dots in perpendicular magnetic fields
• Transport mirages in single-molecule devices
• Counting statistics of cotunneling electrons
• Shot noise spectroscopy on a semiconductor quantum dot in the elastic and inelastic cotunneling regimes
• Controlled complete suppression of single-atom inelastic spin and orbital cotunnelling
• Modeling of cotunneling in quantum dot systems
• Detecting single-electron tunneling involving virtual processes in real time
• Inelastic cotunneling in quantum dots and molecules with weakly broken degeneracies
• Charge fluctuations in nonlinear heat transport
• Co-tunneling assisted sequential tunneling in multi-level quantum dots
• Thermally induced subgap features in the cotunneling spectroscopy of a carbon nanotube
• Application of single-electron effects to fingerprints of chips using image recognition algorithms
• Tunneling induced spin dynamics in a quantum dot-lead hybrid system
• Coulomb-Blocked Transport Through a Quantum Dot with Spin-Split Level: Increase of Differential Conductance Peaks by Spin Relaxation
• Difference in charge and spin dynamics in a quantum dot-lead coupled system
• Quantum dot occupation and electron dwell time in the cotunneling regime
• Strongly correlated charge transport in silicon MOSFET quantum dots
• Finite-bias conductance anomalies at a singlet-triplet crossing
• Universality and quantization of the power to heat ratio in nano-granular systems
• Probing Green's Function Zeros by Co-tunneling through Mott Insulators
• Inelastic Cotunneling Resonances in the Coulomb-Blockade Transport in Donor-Atom Transistors
• Cotunneling signatures of Spin-Electric coupling in frustrated triangular molecular magnets