Inductive microwave response of Yu-Shiba-Rusinov states
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Documents
- PhysRevB.105.054503
Final published version, 3.25 MB, PDF document
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.
Original language | English |
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Article number | 054503 |
Journal | Physical Review B |
Volume | 105 |
Issue number | 5 |
Number of pages | 19 |
ISSN | 2469-9950 |
DOIs | |
Publication status | Published - 3 Feb 2022 |
Bibliographical note
Publisher Copyright:
© 2022 American Physical Society.
Links
- https://arxiv.org/pdf/2112.11261.pdf
Submitted manuscript
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