| Naslov: | Strongly correlated Josephson junction : proximity effect in the single-layer Hubbard model |
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| Avtorji: | ID Rolih, Don, Institut "Jožef Stefan" (Avtor)
ID Žitko, Rok, Institut "Jožef Stefan" (Avtor) |
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| Datoteke: |  URL - Izvorni URL, za dostop obiščite https://journals.aps.org/prb/abstract/10.1103/6tps-wkk4
 PDF - Predstavitvena datoteka, prenos (2,00 MB)
MD5: 4C425DA84A3FF43B40E43DD1854FFBFC
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| Jezik: | Angleški jezik |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: |  IJS - Institut Jožef Stefan
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| Povzetek: | We study the proximity effect in the Hubbard model coupled to BCS superconductors describing a single-layer strongly correlated electron system in a phase-biased Josephson junction. We find two distinct gapped solutions, a Mott-like insulating (M phase) and a proximitized superconducting phase (S phase), separated by a first-order transition with hysteresis. In the M phase, the large correlation-induced charge gap strongly suppresses the critical current, while the S phase behaves as a 0-junction, with a proximitized gap that closes for �=� to yield a correlated metal. Phase bias and junction transparency can thus serve as tuning knobs to switch between conducting and insulating regimes. Working within the dynamical mean-field theory using the numerical renormalization group as the impurity solver, we associate M- and S-phase solutions with the doublet and singlet fixed points of the underlying superconducting Anderson impurity problem. We obtain detailed insight into the spectral structure on all energy scales. In the M phase, the self-energy has sub-gap resonances symmetrically located around the Fermi level resulting from the splitting of the “mid-gap pole” found in Mott insulators; this structure accounts for phase insensitivity. |
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| Ključne besede: | strongly correlated systems, dynamical mean field theory, numerical renormalization group, Hubbard model |
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| Status publikacije: | Objavljeno |
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| Verzija publikacije: | Objavljena publikacija |
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| Poslano v recenzijo: | 16.02.2026 |
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| Datum sprejetja članka: | 17.06.2026 |
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| Datum objave: | 24.07.2026 |
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| Založnik: | American Physical Society |
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| Leto izida: | 2026 |
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| Št. strani: | str. 045124-1-045124-17 |
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| Številčenje: | Vol. 114, iss. 4, [article no.] 045124 |
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| Izvor: | ZDA |
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| PID: | 20.500.12556/DiRROS-32124  |
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| UDK: | 53 |
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| ISSN pri članku: | 2469-9969 |
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| DOI: | 10.1103/6tps-wkk4 |
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| COBISS.SI-ID: | 287473923 |
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| Avtorske pravice: | ©2026 The authors |
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| Opomba: | Nasl. z nasl. zaslona;
Opis vira z dne 11. 8. 2026;
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| Datum objave v DiRROS: | 27.08.2026 |
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| Število ogledov: | 42 |
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| Število prenosov: | 25 |
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| Metapodatki: |    |
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