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Published on: August 2, 2019
Anomalous Fano Resonance in Double Quantum Dot System Coupled to Superconductor
Jan Barański1, Tomasz Zienkiewicz2, Magdalena Barańska2
1Military University of Aviation, ul. Dywizjonu 303 nr 35, PL-08521, Dęblin, Poland. j.baranski@law.mil.pl.
Local pairing influences quantum interference in nanoscopic systems. This study explains anomalous Fano profiles in superconducting systems, revealing their origin from electron pairing.
Area of Science:
- Quantum physics
- Condensed matter physics
- Mesoscopic systems
Background:
- Quantum interference is crucial in nanoscopic systems.
- Fano-type interference arises from scattering on narrow energy levels.
- Superconducting systems exhibit unique resonance features.
Purpose of the Study:
- Analyze the impact of local pairing on quantum interference.
- Explain the origin of anomalous Fano resonances in T-shaped double quantum dots.
- Investigate the interplay between resonances and Kondo physics.
Main Methods:
- Modeling a double quantum dot system coupled to metallic and superconducting electrodes.
- Utilizing a spin-polarized tunneling model.
- Analyzing electron scattering and interference phenomena.
Main Results:
- Identified electron pairing as the cause of anomalous Fano profiles.
- Explained the microscopic mechanism behind uncommon resonance lineshapes.
- Observed interplay between Fano resonances and Kondo physics.
Conclusions:
- Local pairing significantly influences quantum interference in nanoscopic systems.
- The study elucidates the origin of previously unexplained resonance features.
- Findings contribute to understanding electron behavior in hybrid superconducting systems.
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