Cotunneling Spectroscopy in Few-Electron Quantum Dots

2004/08/12 by Dominik M. Zumbühl, D. M. Zumbuhl, C. M. Marcus +3 · 11 citations
Physics and Astronomy · #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #Surface and Thin Film Phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.93.256801

published as Phys. Rev. Lett. 93, 256801 (2004) · related papers available at http://marcuslab.harvard.edu

arxiv created 2004/08/12 · openalex publication_date 2004/12/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Few-electron quantum dots are investigated in the regime of strong tunneling to the leads. Inelastic cotunneling is used to measure the two-electron singlet-triplet splitting above and below a magnetic field driven singlet-triplet transition. Evidence for a nonequilibrium two-electron singlet-triplet Kondo effect is presented. Cotunneling allows orbital correlations and parameters characterizing entanglement of the two-electron singlet ground state to be extracted from dc transport.

Citations

• Electronic structure of quantum dots
• Singlet-Triplet Transition Tuned by Asymmetric Gate Voltages in a Quantum Ring
• Zeeman Energy and Spin Relaxation in a One-Electron Quantum Dot
• Single-shot read-out of an individual electron spin in a quantum dot

Cited by

• Spin effects in single-electron tunnelling
• Dynamical screening of the Coulomb interaction for two confined electrons in a magnetic field
• Nonequilibrium magnetotransport through a quantum dot: An interpolative perturbative approach
• Strongly Correlated Two-Photon Transport in a One-Dimensional Waveguide Coupled to a Two-Level System
• Zero-bias anomaly in cotunneling transport through quantum-dot spin valves
• Two-stage Kondo effect and Kondo-box level spectroscopy in a carbon nanotube
• Singlet-triplet splitting in double quantum dots due to spin-orbit and hyperfine interactions
• Coherent Probing of Excited Quantum Dot States in an Interferometer
• Spin-Blockade Spectroscopy of Si/Si-Ge Quantum Dots
• Tuning the electrically evaluated electron Landégfactor in GaAs quantum dots and quantum wells of different well widths
• Full counting statistics and shot noise of cotunneling in quantum dots and single-molecule transistors