High-transition-temperature superconducting quantum interference devices

Koelle, D.; Kleiner, R.; Ludwig, Frank; Dantsker, E.; Clarke, John

doi:10.1103/revmodphys.71.631

Cited by 370 publications

(261 citation statements)

References 304 publications

(296 reference statements)

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“…1 The SQUID signal in principle can be calculated by our 2D method, see Ref. 7 for a detailed theory of such SQUIDs and for the 1D problem of a long double strip that models a linear SQUID.…”

Section: Discussionmentioning

confidence: 99%

Thin superconductors and SQUIDs in perpendicular magnetic field

Brandt

2005

Phys. Rev. B

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It is shown how the static and dynamic electromagnetic properties can be calculated for thin flat superconducting films of any shape and size, also multiply connected as used for SQUIDs, and for any value of the effective magnetic London penetration depth Λ. As examples, the distributions of sheet current and magnetic field are obtained for rectangular and circular films without and with slits and holes, in response to an applied perpendicular magnetic field and to magnetic vortices moving in the film. The self energy and interaction of vortices with each other and with an applied magnetic field and/or transport current are given. Due to the long ranging magnetic stray field, these energies depend on the size and shape of the film and on the vortex position even in large films, in contrast to the situation in large bulk superconductors. The focussing of magnetic flux into the central hole of square films without and with a radial slit is compared.

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Section: Discussionmentioning

confidence: 99%

Thin superconductors and SQUIDs in perpendicular magnetic field

Brandt

2005

Phys. Rev. B

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“…[73], and review papers by Koelle et al [74] and Newman et al [75]. Here, only 2 more materials science related and one physics related examples are briefly described.…”

Section: General Remarksmentioning

confidence: 99%

Science and technology of cuprate-based high temperature superconductor thin films, heterostructures and superlattices—the first 30 years (Review Article)

Habermeier

2016

Low Temperature Physics

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Science and technology of cuprate-based high temperature superconductor thin films, heterostructures and superlattices -the first 30 years (Review Article) H.-U. Habermeier Science Consulting International, Niersteinerstr, 28, Stuttgart D 70499, Germany Max-Planck-Institute for Solid State Research, Heisenbergstr, 1, Stuttgart D 70569, Germany E-mail: huh@fkf.mpg.de Received May 30, 2016, published online August 25, 2016 During the three decades after the discovery of superconductivity at high temperatures in copper oxides, intense research activities generated a tremendous progress in both, mastering the scientific challenges underpinning the understanding of the properties of these chemically and structurally complex materials as well as achieving a mature technology in preparing single phase bulk specimens -including single crystals -and epitaxially grown single crystalline thin films. This review covers in addition to more basic physics oriented developments mainly technological aspects of complex oxide thin film deposition as an enabling technology to explore the physics of these materials. It consists of two parts: after a brief introduction to the materials development prior to the discovery of superconducting copper oxides, a description of the relevant properties of copper oxide superconductors with focus on YBa 2 Cu 3 O 7-δ is given, followed by the coverage of essentials of complex oxide thin film deposition technology with the copper oxides at its core. Here, the major physical vapor deposition technologies (evaporation and oxide molecular beam technology, sputtering and pulsed laser deposition) are described followed by an overview of substrate requirements to deposit high quality thin films. Opportunities by choosing special substrates with unique properties far beyond the usual mechanical support for a film are introduced with examples aside from usual lattice mismatch induced strain effects. One is the continuous modification of the strain state by poling ferroelectric oxide substrates linked to a piezoelectric effect, the other is the nanoscale tailoring of substrate step-and-terrace structures resulting in a controllable generation of planar defects in complex oxides, thus contributing to the physics of flux-line pinning in cuprate superconductors. In the second part of this review, first some highlights of single layer thin film research are given such as to tailor thin film orientation, generating well defined antiphase boundaries in YBa 2 Cu 3 O 7-δ thin films as flux-line pinning centers as well as contributions to understand fluctuation conductivity in relation to the pseudogap state. In the last section new developments in high T c cuprate based heterostructures and superlattices are reviewed with a special focus on the opportunities offered by interface-induced electronic interactions.

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“…Note also that the q n s are uniquely determined by the parameters of the system, and they vanish with vanishing φ ac . From the analytical solution at frequencies within the linear flux-wave band, equation (27) which corresponds to either s > +1/2 or s < −1/2, the resonance frequencies of the array can be obtained by setting sin[(N + 1)θ ′ ] = 0. Thus we get…”

Section: Energy Transmission Through Squidmentioning

confidence: 99%

“…The SQUID is a strongly nonlinear resonator [22,23], that is tuneable over a wide frequency range by applying either a flux bias [18,24] or by varying the incoming rf power of an applied alternating field [24,25]. This superconducting device has found up to date numerous applications [26,27,28,29], and it is known to be the worlds most sensitive detector of magnetic signals. The replacement of metallic SRRs with rf SQUIDs, which have no direct electrical conduct but instead they are coupled magnetically through their mutual inductances, has been suggested theoretically a few years ago [30,31].…”

Section: Introductionmentioning

confidence: 99%

Wide-band tuneability, nonlinear transmission, and dynamic multistability in SQUID metamaterials

2014

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Superconducting metamaterials comprising rf SQUIDs (Superconducting QUantum Interference Devices) have been recently realized and investigated with respect to their tuneability, permeability and dynamic multistability properties. These properties are a consequence of intrinsic nonlinearities due to the sensitivity of the superconducting state to external stimuli. SQUIDs, made of a superconducting ring interrupted by a Josephson junction, possess yet another source of nonlinearity, which makes them widely tuneable with an applied dc dlux. A model SQUID metamaterial, based on electric equivalent circuits, is used in the weak coupling approximation to demonstrate the dc flux tuneability, dynamic multistability, and nonlinear transmission in SQUID metamaterials comprising non-hysteretic SQUIDs. The model equations reproduce the experimentally observed tuneability patterns, and predict tuneability with the power of an applied ac magnetic magnetic field. Moreover, the results indicate the opening of nonlinear frequency bands for energy transmission through SQUID metamaterials, for sufficiently strong ac fields.

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High-transition-temperature superconducting quantum interference devices

Cited by 370 publications

References 304 publications

Thin superconductors and SQUIDs in perpendicular magnetic field

Thin superconductors and SQUIDs in perpendicular magnetic field

Science and technology of cuprate-based high temperature superconductor thin films, heterostructures and superlattices—the first 30 years (Review Article)

Wide-band tuneability, nonlinear transmission, and dynamic multistability in SQUID metamaterials

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