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Tunable reentrant Kondo effect in quantum dots coupled to metal-superconducting hybrid reservoirs
- 1.0553606 - FZÚ 2022 RIV US eng J - Journal Article
Zalom, Peter - Novotný, T.
Tunable reentrant Kondo effect in quantum dots coupled to metal-superconducting hybrid reservoirs.
Physical Review B. Roč. 104, č. 3 (2021), č. článku 035437. ISSN 2469-9950. E-ISSN 2469-9969
R&D Projects: GA ČR GA19-13525S; GA MŠMT LTC19045
Research Infrastructure: e-INFRA CZ - 90140
Institutional support: RVO:68378271
Keywords : numerical renormalization-group * Josephson junction * quantum phase transitions
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.908, year: 2021
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevB.104.035437
We elaborate on concept of reentrant Kondo effect in quantum impurities/dots coupled to hybrid metal-semiconductor contacts. By noticing the equivalence of the originally suggested semiconducting arrangement to an analogous three-terminal quantum dot setup with a normal and two phase-biased superconducting leads introduced in our recent work, we put this effect into a new physical context. First, we identify the superconducting counterpart of the reentrant Kondo effect and, consequently, reveal its fragility with respect to an underlying doublet-singlet quantum phase transition induced by the particle-hole asymmetry of the reservoir densities of states. Furthermore, we analyze the experimental feasibility of observing the reentrant Kondo effect in its superconducting realization concluding that even present day experiments might see the onset of the reentrant behavior, but fully developed Kondo features cannot be reached due to the required vast separation of energy/temperature scales.
Permanent Link: http://hdl.handle.net/11104/0328410
Number of the records: 1