Tuning Yu-Shiba-Rusinov States in a Quantum Dot

Abstract

We present transport spectroscopy of sub-gap states in a bottom gated InAs nanowire coupled to a normal lead and a superconducting aluminium lead. The device shows clearly resolved sub-gap states which we can track as the coupling parameters of the system are tuned and as the gap is closed by means of a magnetic field. We systematically extract system parameters by using numerical renormalization group theory fits as a level of the quantum dot is tuned through a quantum phase transition electrostatically and magnetically. We also give an intuitive description of sub-gap excitations.

9 pages, 10 figures

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Cited by in corpus (13)

• A perspective on semiconductor-based superconducting qubits
• Scaling of Yu-Shiba-Rusinov energies in the weak-coupling Kondo regime
• Spectroscopy of the superconducting proximity effect in nanowires using integrated quantum dots
• Yu-Shiba-Rusinov states of impurities in a triangular lattice of NbSe${}_2$ with spin orbit coupling
• Josephson-phase-controlled interplay between correlation effects and electron pairing in a three-terminal nanostructure
• Dynamical quantum phase transitions in a mesoscopic superconducting system
• Magnetic impurities in spin-split superconductors
• Nb/InAs nanowire proximity junctions from Josephson to quantum dot regimes
• Inductive microwave response of Yu-Shiba-Rusinov states
• Tunable reentrant Kondo effect in quantum dots coupled to metal-superconducting hybrid reservoirs
• Yu-Shiba-Rusinov States and Ordering of Magnetic Impurities Near the Boundary of a Superconducting Nanowire
• Superconducting quantum dot and the sub-gap states
• Effects of electron-electron interaction and spin-orbit coupling on Andreev pair qubits in quantum dot Josephson junctions