Two-Impurity Yu-Shiba-Rusinov States in Coupled Quantum Dots

Juan Carlos Estrada Saldaña; Alexandros Vekris; Rok Zitko; Gorm Ole Steffensen; Peter Krogstrup; Jens Paaske; Kasper Grove-Rasmussen; Jesper Nygård

Two-Impurity Yu-Shiba-Rusinov States in Coupled Quantum Dots

Juan Carlos Estrada Saldaña, Alexandros Vekris, Rok Zitko, Gorm Ole Steffensen, Peter Krogstrup, Jens Paaske, Kasper Grove-Rasmussen, Jesper Nygård

Condensed Matter Physics

Abstract

Using Coulomb blockaded double quantum dots, we realize the superconducting analog of the celebrated two-impurity Kondo model. Focusing on gate regions with a single spin-1/2 on each dot, we demonstrate gate-tuned changes of the ground state from an interdot singlet to independently screened Yu-Shiba-Rusinov singlets. In contrast to the zero-temperature two-impurity Kondo model, the crossover between these two singlets is heralded by quantum phase boundaries to nearby doublet phases, in which only a single spin is screened. We identify all four ground states via transport measurements.

Original language	English
Publisher	arXiv preprint
Publication status	Submitted - 21 Dec 2018

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title = "Two-Impurity Yu-Shiba-Rusinov States in Coupled Quantum Dots",

abstract = "Using Coulomb blockaded double quantum dots, we realize the superconducting analog of the celebrated two-impurity Kondo model. Focusing on gate regions with a single spin-1/2 on each dot, we demonstrate gate-tuned changes of the ground state from an interdot singlet to independently screened Yu-Shiba-Rusinov singlets. In contrast to the zero-temperature two-impurity Kondo model, the crossover between these two singlets is heralded by quantum phase boundaries to nearby doublet phases, in which only a single spin is screened. We identify all four ground states via transport measurements.",

author = "{Estrada Salda{\~n}a}, {Juan Carlos} and Alexandros Vekris and Rok Zitko and Steffensen, {Gorm Ole} and Peter Krogstrup and Jens Paaske and Kasper Grove-Rasmussen and Jesper Nyg{\aa}rd",

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T1 - Two-Impurity Yu-Shiba-Rusinov States in Coupled Quantum Dots

AU - Estrada Saldaña, Juan Carlos

AU - Vekris, Alexandros

AU - Zitko, Rok

AU - Steffensen, Gorm Ole

AU - Krogstrup, Peter

AU - Paaske, Jens

AU - Grove-Rasmussen, Kasper

AU - Nygård, Jesper

N1 - [Qdev]

PY - 2018/12/21

Y1 - 2018/12/21

N2 - Using Coulomb blockaded double quantum dots, we realize the superconducting analog of the celebrated two-impurity Kondo model. Focusing on gate regions with a single spin-1/2 on each dot, we demonstrate gate-tuned changes of the ground state from an interdot singlet to independently screened Yu-Shiba-Rusinov singlets. In contrast to the zero-temperature two-impurity Kondo model, the crossover between these two singlets is heralded by quantum phase boundaries to nearby doublet phases, in which only a single spin is screened. We identify all four ground states via transport measurements.

AB - Using Coulomb blockaded double quantum dots, we realize the superconducting analog of the celebrated two-impurity Kondo model. Focusing on gate regions with a single spin-1/2 on each dot, we demonstrate gate-tuned changes of the ground state from an interdot singlet to independently screened Yu-Shiba-Rusinov singlets. In contrast to the zero-temperature two-impurity Kondo model, the crossover between these two singlets is heralded by quantum phase boundaries to nearby doublet phases, in which only a single spin is screened. We identify all four ground states via transport measurements.

M3 - Working paper

BT - Two-Impurity Yu-Shiba-Rusinov States in Coupled Quantum Dots

PB - arXiv preprint

ER -

Two-Impurity Yu-Shiba-Rusinov States in Coupled Quantum Dots

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