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Article Dans Une Revue Physical Review B Année : 2020

Elimination of thermal bistability in superconducting weak links by an inductive shunt

Résumé

The quantum phase-coherent behavior of superconducting weak links (WLs) is often quenched in the finite voltage state, due to the heat dissipation and related thermal hysteresis. The latter can be reduced by improving heat evacuation and/or by lowering the critical current so a phase-dynamic regime is obtained, albeit over a narrow bias-current and temperature range. Here we demonstrate that an inductive shunt with well-chosen parameters introduces unexpected nonlinear dynamics that destabilize an otherwise stable fixed point in the dissipative branch. This leads to a nonhysteretic behavior with large voltage oscillations in intrinsically hysteretic WL-based micron-size superconducting quantum interference devices. A dynamic thermal model quantitatively describes our observations and further allows us to elaborate on the optimal shunting conditions.
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Dates et versions

hal-02655327 , version 1 (07-11-2020)

Identifiants

Citer

Sourav Biswas, Clemens Winkelmann, Hervé Courtois, Thierry Dauxois, Hillol Biswas, et al.. Elimination of thermal bistability in superconducting weak links by an inductive shunt. Physical Review B, 2020, 101 (2), pp.024501. ⟨10.1103/PhysRevB.101.024501⟩. ⟨hal-02655327⟩
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