Probing the microscopic structure of bound states in quantum point contacts

Abstract

Using an approach that allows us to probe the electronic structure of strongly pinched-off quantum point contacts (QPCs), we provide evidence for the formation of self-consistently realized bound states (BSs) in these structures. Our approach exploits the resonant interaction between closely-coupled QPCs, and demonstrates that the BSs may give rise to a robust confinement of single spins, which show clear Zeeman splitting in a magnetic field.

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• Bias and temperature dependence of the 0.7 conductance anomaly in Quantum Point Contacts
• Density dependent spin polarisation in ultra low-disorder quantum wires
• Magnetic impurity formation in quantum point contacts
• Spontaneous spin polarization in quantum point contacts
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• Zeeman splitting in ballistic hole quantum wires
• Fano factor reduction on the 0.7 structure in a ballistic one-dimensional wire
• Detection of local-moment formation using the resonant interaction between coupled quantum wires

Cited by in corpus (25)

• A review of progress in the physics of open quantum systems: theory and experiment
• What lurks below the last plateau: Experimental studies of the 0.7 x 2e^2/h conductance anomaly in one-dimensional systems
• On the Zero-Bias Anomaly in Quantum Wires
• Subradiant hybrid states in the open 3D Anderson-Dicke model
• Observation of the Kondo Effect in a Spin-3/2 Hole Quantum Dot
• Electronic magnetization of a quantum point contact measured by nuclear magnetic resonance
• Width bifurcation and dynamical phase transitions in open quantum systems
• Detector Backaction on the Self-Consistent Bound State in Quantum Point Contacts
• Electron phase shift at the zero-bias anomaly of quantum point contacts
• Extreme sensitivity of the spin-splitting and 0.7 anomaly to confining potential in one-dimensional nanoelectronic devices
• Evidence for the Formation of Quasi-Bound-State in an Asymmetrical Quantum Point Contact
• Conductance Anomaly and Fano Factor Reduction in Quantum Point Contacts
• Tuning the Fano Resonance with an Intruder Continuum
• Dynamical stabilization and time in open quantum systems
• Fractional quantization of ballistic conductance in 1D hole systems
• Thermoelectric Scanning Gate Interferometry on a Quantum Point Contact
• Charge fluctuations and feedback effect in shot noise in a Y-terminal system
• Spin polarization in modulation-doped GaAs quantum wires
• Finite shot noise and electron heating at quantized conductance in high-mobility quantum point contacts
• Dynamic nuclear polarization at high Landau levels in a quantum point contact
• Observation of Wigner cusps in a metallic carbon nanotube
• Detecting weak coupling in mesoscopic systems with a nonequilibrium Fano resonance
• Mode-filtered electron injection into a waveguide interferometer
• A Scaling Approach for Interacting Quantum Wires -a Possible Explanation for the 0.7 Anomalous Conductance
• Entanglement and transport anomalies in nanowires