Incipient Berezinskii-Kosterlitz-Thouless transition in two-dimensional coplanar Josephson junctions
نویسندگان
چکیده
D. Massarotti,1,2,* B. Jouault,3 V. Rouco,4 S. Charpentier,5 T. Bauch,5 A. Michon,6 A. De Candia,2,4 P. Lucignano,2,4 F. Lombardi,5 F. Tafuri,1,2 and A. Tagliacozzo2,4,7 1Dipartimento di Ingegneria Industriale e dell’Informazione, Seconda Università di Napoli, I-81031 Aversa (CE), Italy 2CNR-SPIN UOS Napoli, Monte S. Angelo-Via Cintia, I-80126, Napoli, Italy 3Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-Université de Montpellier, F-34095, Montpellier, France 4Dipartimento di Fisica “E. Pancini”, Università di Napoli Federico II, Monte S. Angelo-Via Cintia, I-80126 Napoli, Italy 5Department of Microtechnology and Nanoscience, Chalmers University of Technology, SE-412 96 Göteborg, Sweden 6Centre de Recherche sur l’Hétéro-Epitaxie et ses Applications (CRHEA), CNRS, rue Bernard Grégory, 06560 Valbonne, France 7INFN, Laboratori Nazionali di Frascati, Via E. Fermi, Frascati, Italy (Received 11 May 2016; revised manuscript received 20 July 2016; published 31 August 2016)
منابع مشابه
Capacitively coupled Josephson-junction chains: straight and slanted coupling
Two chains of ultrasmall Josephson junctions, coupled capacitively with each other in the two different ways, straight and slanted coupling, are considered. As the coupling capacitance increases, regardless of the coupling scheme, the transport of particle-hole pairs in the system is found to drive the quantumphase transition at zero temperature, which is a insulator-to-superfluid transition of...
متن کاملIntroduction to the Berezinskii-Kosterlitz-Thouless Transition
This essay examines the Berezinskii-Kosterlitz-Thousless transition in the two-dimensional XY model. It is an imporant example of phase transitions occuring without an ordered phase or symmetry breaking, and introduced topological ideas into the concerns of condensed matter physicists.
متن کاملVortex proliferation in the Berezinskii-Kosterlitz-Thouless regime on a two-dimensional lattice of Bose-Einstein condensates.
We observe the proliferation of vortices in the Berezinskii-Kosterlitz-Thouless regime on a two-dimensional array of Josephson-coupled Bose-Einstein condensates. As long as the Josephson (tunneling) energy J exceeds the thermal energy T, the array is vortex free. With decreasing J/T, vortices appear in the system in ever greater numbers. We confirm thermal activation as the vortex-formation mec...
متن کاملBerezinskii-kosterlitz-thouless Transition in Josephson Junction Arrays
The quantum XY model shows a Berezinskii-Kosterlitz-Thouless (BKT) transition between a phase with quasi long-range order and a disordered one, like the corresponding classical model. The effect of the quantum fluctuations is to weaken the transition and eventually to destroy it. However, in this respect the mechanism of disappearance of the transition is not yet clear. In this work we address ...
متن کاملBerezinskii-Thouless-Kosterlitz Transition in a Two-Dimensional Atomic Gas
We introduce the concepts of Berezinskii-Kosterlitz-Thouless (BKT) transition and quasi longrange order in the context of the 2D electron gas model. We then apply this framework to 2D superfluidity to obtain the superfluid transition temperature. Finally, we review the recent experimental work of Hadzibabic et al. which observes BKT transition in a 2D trapped Rb gas. Thermal de Broglie waveleng...
متن کامل