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Thermal expansion of Josephson junctions as an elastic response to an effective stress field | | S. Sergeenkov
; G. Rotoli
; G. Filatrella
; F.M. Araujo-Moreira
; 10.1103/PhysRevB.75.014506
; | | Date: |
18 Jan 2007 | | Journal: | Phys. Rev. B 75, 014506 (2007) | | Subject: | Superconductivity | | Abstract: | By introducing a concept of thermal expansion (TE) of a Josephson junction as an elastic response to an effective stress field, we study (both analytically and numerically) the temperature and magnetic field dependence of TE coefficient $alpha $ in a single small junction and in a square array. In particular, we found that in addition to {it field} oscillations due to Fraunhofer-like dependence of the critical current, $alpha $ of a small single junction also exhibits strong flux driven {it temperature} oscillations near $T_C$. We also numerically simulated stress induced response of a closed loop with finite self-inductance (a prototype of an array) and found that $alpha $ of a $5 imes 5$ array may still exhibit temperature oscillations provided the applied magnetic field is strong enough to compensate for the screening induced effects. | | Source: | arXiv, cond-mat/0701459 | | Services: | Forum | Review | PDF | Favorites | |
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