Inductive microwave response of Yu-Shiba-Rusinov states
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Inductive microwave response of Yu-Shiba-Rusinov states. / Hermansen, C.; Yeyati, A. Levy; Paaske, J.
In: Physical Review B, Vol. 105, No. 5, 054503, 03.02.2022.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Inductive microwave response of Yu-Shiba-Rusinov states
AU - Hermansen, C.
AU - Yeyati, A. Levy
AU - Paaske, J.
N1 - Publisher Copyright: © 2022 American Physical Society.
PY - 2022/2/3
Y1 - 2022/2/3
N2 - We calculate the frequency-dependent admittance of a phase-biased Josephson junction spanning a magnetic impurity or a spinful Coulomb-blockaded quantum dot. The local magnetic moment gives rise to Yu-Shiba-Rusinov bound states, which govern the subgap absorption as well as the inductive response. We model the system by a superconducting spin-polarized exchange-cotunnel junction and calculate the linear current response to an ac bias voltage, including its dependence on phase bias as well as particle-hole and source-drain coupling asymmetry. The corresponding inductive admittance is analyzed and compared to results of a zero bandwidth, as well as an infinite-gap approximation to the superconducting Anderson model. All three approaches capture the interaction-induced 0-π transition, which is reflected as a discontinuity in the adiabatic inductive response.
AB - We calculate the frequency-dependent admittance of a phase-biased Josephson junction spanning a magnetic impurity or a spinful Coulomb-blockaded quantum dot. The local magnetic moment gives rise to Yu-Shiba-Rusinov bound states, which govern the subgap absorption as well as the inductive response. We model the system by a superconducting spin-polarized exchange-cotunnel junction and calculate the linear current response to an ac bias voltage, including its dependence on phase bias as well as particle-hole and source-drain coupling asymmetry. The corresponding inductive admittance is analyzed and compared to results of a zero bandwidth, as well as an infinite-gap approximation to the superconducting Anderson model. All three approaches capture the interaction-induced 0-π transition, which is reflected as a discontinuity in the adiabatic inductive response.
U2 - 10.1103/PhysRevB.105.054503
DO - 10.1103/PhysRevB.105.054503
M3 - Journal article
AN - SCOPUS:85124663695
VL - 105
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 5
M1 - 054503
ER -
ID: 307294420