1995
DOI: 10.1103/physrevlett.75.717
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Transformer Configuration in Three Dimensional Josephson Lattices at Zero Magnetic Field

Abstract: Recent experiments on Bi2Sr2CaCu20q Y superconductors at zero magnetic field have been performed with a transformer configuration of contacts. We interpret the experimental data on the basis of largescale Langevin dynamical simulations of a three dimensional (3D) Josephson lattice with a current bias through a single plane. We show that the experimentally observed effects can be attributed to linking thermal vortex loop excitations that cause voltages in neighboring superconducting planes to lock in a narrow t… Show more

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Cited by 12 publications
(7 citation statements)
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“…The model has been extensively used and is described in Refs. [17,18] and here we give only a brief summary of the method.…”
Section: Numerical Simulationsmentioning
confidence: 99%
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“…The model has been extensively used and is described in Refs. [17,18] and here we give only a brief summary of the method.…”
Section: Numerical Simulationsmentioning
confidence: 99%
“…Details of the numerical method have been presented in previous works. 17,18 The mean in-plane critical currents I c are larger than the mean inter-plane critical currents I ⊥ c by an anisotropy factor γ 2 ( γ 2 ≡ I c /I ⊥ c ), and I c = I c = 2πEJ φ0 . At the same time, the ratio between the in-plane resistance R and the out of plane resistance R ⊥ is given by 1/γ 2 .…”
Section: Numerical Simulationsmentioning
confidence: 99%
“…As envisioned by Onsager and Feynman 4,5 , the restoration of a continuous U(1) symmetry, like the superfluid to normal transition of 4 He, can occur via proliferation of vortices. The role of these topological defects in symmetry-breaking phase transitions is now a prime topic in different areas of physics, such as cosmology 6,7 and high-Tc superconductivity [8][9][10][11][12] , even though they are difficult to observe 13 . The potential of having emergent continuous symmetries in magnets or ferroelectrics with discrete microscopic symmetries opens the possibility of observing a similar proliferation of vortices in insulating materials.…”
mentioning
confidence: 99%
“…Topological defects are ubiquitous in condensed matter physics where their role in symmetry-breaking phase transitions is currently a prime topic in high-temperature superconductivity [1][2][3][4][5], multiferroics [6][7][8], liquid crystals [9,10], and 3 He and 4 He superfluids [11][12][13][14]. In multiferroics, physical properties of topological defects, such as coupling between structural, charge, and spin degrees of freedom, are different from the bulk properties of the parent material.…”
mentioning
confidence: 99%
“…1(a)] with the asterisk symbols denoting the corresponding blocks that are rotated by 180°about the c axis. In work [17] BHF was investigated as a quantum paraelectric with a T c of 6 K. Other studies suggest large spontaneous polarization in bulk BHF ceramics at room temperature [18,19] with a maximum remnant polarization of 11.8 μC/cm 2 [18]. It thus holds promise as a low toxicity, lead-free multiferroic.…”
mentioning
confidence: 99%