Detection of local-moment formation using the resonant interaction between coupled quantum wires
arXiv:cond-mat/0307334 · doi:10.1103/PhysRevLett.92.096802
Abstract
We study the influence of many-body interactions on the transport characteristics of a novel device structure, consisting of a pair of quantum wires that are coupled to each other by means of a quantum dot. Under conditions where a local magnetic moment is formed in one of the wires, we show that tunnel coupling to the other gives rise to an associated peak in its density of states, which can be detected directly in a conductance measurement. Our theory is therefore able to account for the key observations in the recent study of T. Morimoto et al. [Appl. Phys. Lett. {\bf 82}, 3952 (2003)], and demonstrates that coupled quantum wires may be used as a system for the detection of local magnetic-moment formation.
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- Non-Hermitian Physics
- 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
- Probing the microscopic structure of bound states in quantum point contacts
- Electron transport through quantum wires and point contacts
- Detector Backaction on the Self-Consistent Bound State in Quantum Point Contacts
- Tuning the Fano Resonance with an Intruder Continuum
- Thermoelectric Scanning Gate Interferometry on a Quantum Point Contact
- Influence of Magnetic Moment Formation on the Conductance of Coupled Quantum Wires
- Detecting weak coupling in mesoscopic systems with a nonequilibrium Fano resonance
- Electron Dynamics in a Coupled Quantum Point Contact Structure with a Local Magnetic Moment