π junction behavior and Andreev bound states in Kondo quantum dots with superconducting leads
Gabriel Sellier, Thilo Kopp, Johann Kroha, Yuri S. Barash
DOI 10.1103/PhysRevB.72.174502 · Physical Review B
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Abstract
We investigate the temperature- and coupling-dependent transport through Kondo dot contacts with symmetric superconducting s-wave leads. For finite temperature T we use a superconducting extension of a self-consistent auxiliary boson scheme (SNCA), while at T=0 a perturbative renormalization group treatment is applied. The finite-temperature phase diagram for the 0−π transition of the Josephson current in the junction is established and related to the phase-dependent position of the subgap Kondo resonance with respect to the Fermi energy. The conductance of the contact is evaluated in the zero-bias limit. It approaches zero in the low-temperature regime, however, at finite T its characteristics are changed through the coupling- and temperature-dependent 0−π transition.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Au/Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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