Hysteretic Superconducting Heat-Flux Quantum Modulator
- National Research Council (CNR), Genova (Italy). Inst. for Superconductors, Innovative Materials and Devices (CNR-SPIN); National Research Council (CNR), Pisa (Italy). NEST, Inst. Nanoscienze, Scuola Normale Superiore; Lobachevsky State Univ., Nizhni Novgorod (Russia)
- National Research Council (CNR), Genova (Italy). Inst. for Superconductors, Innovative Materials and Devices (CNR-SPIN)
- Univ. of California San Diego, La Jolla, CA (United States)
- National Research Council (CNR), Pisa (Italy). NEST, Inst. Nanoscienze, Scuola Normale Superiore
In this work, we discuss heat transport in a thermally biased superconducting quantum-interference device (SQUID) in the presence of an external magnetic flux, when a non-negligible inductance of the SQUID ring is taken into account. A properly sweeping driving flux causes the thermal current to modulate and behave hysteretically. The response of this device is analyzed as a function of both the hysteresis parameter and the degree of asymmetry of the SQUID, highlighting the parameter range over which hysteretic behavior is observable. Markedly, the temperature of the SQUID also shows hysteretic evolution, with sharp transitions characterized by temperature jumps up to, e.g., approximately 0.02 K for a realistic Al-based setup. In view of these results, the proposed device can effectively find an application as a temperature-based superconducting memory element, working even at gigahertz frequencies by suitably choosing the superconductor on which the device is based.
- Research Organization:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); European Research Council (ERC); MIUR
- Grant/Contract Number:
- FG02-05ER46204; 615187; 630925; RBFR1379UX
- OSTI ID:
- 1535762
- Alternate ID(s):
- OSTI ID: 1352969
- Journal Information:
- Physical Review Applied, Vol. 7, Issue 4; ISSN 2331-7019
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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