Journal ArticleDOI
Recent Achievements on the Physics of High- T C Superconductor Josephson Junctions: Background, Perspectives and Inspiration
Francesco Tafuri,Davide Massarotti,Luca Galletti,Daniela Stornaiuolo,Domenico Montemurro,Luigi Longobardi,P. Lucignano,G. Rotoli,Giovanni Piero Pepe,Arturo Tagliacozzo,Floriana Lombardi +10 more
TLDR
In this article, a review of interesting new problems concerning high critical temperature superconductors (HTS) Josephson junction (JE) of inspiration also for other systems is presented.Abstract:
Coherent passage of Cooper pairs in a Josephson junction (JJ) above the liquid nitrogen temperature has been the first impressive revolutionary effect induced by high critical temperature superconductors (HTS) in the domain of the study of Josephson effect (JE). But this has been only the start. A d-wave order parameter has lead to significant novel insights in the physics of the JE turning into a device the notion of a π-junction. Spontaneous currents in a frustrated geometry, Andreev bound states, long-range proximity effect have rapidly become standard terms in the study of the JE, standing as a reference bench for conventional systems based on low critical temperature superconductors (LTS) and inspiring analogies for junctions based on novel superconductors discovered in the meantime. The extreme richness of the physics of HTS JJs has not been adequately supported by the expected impact in the applications, the main reason lying in the complexity of these materials and in the consequent unsatisfactory yield and reproducibility of the performances of the JJs within the required limits. The continuous progress in material science, and specifically in the realization of oxide multi-layers, and in nanotechnologies applied to superconductors, accompanied by the advances in a better understanding of the properties of HTS and of HTS devices, has as a matter of fact opened possible novel scenarios and interest in the field. We intend to give a brief overview on interesting new problems concerning HTS JJs of inspiration also for other systems. We also review some ideas and experimental techniques on macroscopic quantum decay phenomena occurring in Josephson structures. The attention is mainly addressed to intermediate levels of dissipation, which characterize a large majority of low critical current Josephson devices and are therefore an unavoidable consequence of nanotechnology applied more and more to Josephson devices.read more
Citations
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Domain boundary-dominated systems: adaptive structures and functional twin boundaries
TL;DR: In this article, the adaptive ferroic state was found in morphotropic phase boundary piezoelectric crystals and shape memory alloys, where the domain size is miniaturized to near-atomic scales and the domain boundary density becomes extremely high.
Journal Article
Carbon Nanotube Superconducting Quantum Interference Device.
TL;DR: In this paper, a superconducting quantum interference device (SQUID) with single-walled carbon nanotube (CNT) Josephson junctions is presented, where quantum confinement in each junction induces a discrete quantum dot energy level structure, which can be controlled with two lateral electrostatic gates.
Journal ArticleDOI
Josephson junctions and SQUIDs created by focused helium ion beam irradiation of YBa$_2$Cu$_3$O$_7$
B. Müller,Max Karrer,F. Limberger,M. Becker,B. Schröppel,Claus Burkhardt,Reinhold Kleiner,Edward Goldobin,Dieter Koelle +8 more
TL;DR: In this paper, a scan with a focused He ion beam (He-FIB) across YBa$_2$Cu$_3$O$_7$ (YBCO) thin film microbridges was used to create Josephson barriers with critical current density, adjustable by irradiation dose.
Journal ArticleDOI
Josephson Junctions and SQUIDs Created by Focused Helium-Ion-Beam Irradiation of Y Ba 2 Cu 3 O 7
B. Müller,Max Karrer,F. Limberger,M. Becker,B. Schröppel,Claus Burkhardt,Reinhold Kleiner,Edward Goldobin,Dieter Koelle +8 more
TL;DR: In this article, a focused helium ion beam (He-FIB) is used to draw Josephson junctions anywhere on the chip, which can also produce highly resistive walls that can be used as circuit boundaries, avoiding extra lithography.
Journal ArticleDOI
Highly homogeneous YBCO/LSMO nanowires for photoresponse experiments
Riccardo Arpaia,Riccardo Arpaia,Mikkel Ejrnaes,Loredana Parlato,Roberto Cristiano,Marco Arzeo,Thilo Bauch,Shahid Nawaz,F. Tafuri,G. P. Pepe,Floriana Lombardi +10 more
TL;DR: By using nanolithography and a soft etching procedure, the authors realized YBa2Cu3O7-x/La0.7Sr0.3MnO3 (YBCO/LSMO) nanowires, with cross sections down to 100 x 50 nm(2) that ensure the cover age of areas up to 10 x 30 mu m(2).
References
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