Author
Igor I. Soloviev
Other affiliations: Moscow State Institute of Radio Engineering, Electronics and Automation, Nizhny Novgorod State Technical University, Saratov State University ...read more
Bio: Igor I. Soloviev is an academic researcher from Moscow State University. The author has contributed to research in topics: Josephson effect & Superconductivity. The author has an hindex of 23, co-authored 106 publications receiving 1460 citations. Previous affiliations of Igor I. Soloviev include Moscow State Institute of Radio Engineering, Electronics and Automation & Nizhny Novgorod State Technical University.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, the authors consider operation principles of an energy-efficient superconductor logic and memory circuits with a short retrospective review of their evolution and analyze their shortcomings in respect to computer circuits design.
Abstract: The predictions of Moore's law are considered by experts to be valid until 2020 giving rise to "post-Moore's" technologies afterwards. Energy efficiency is one of the major challenges in high-performance computing that should be answered. Superconductor digital technology is a promising post-Moore's alternative for the development of supercomputers. In this paper, we consider operation principles of an energy-efficient superconductor logic and memory circuits with a short retrospective review of their evolution. We analyze their shortcomings in respect to computer circuits design. Possible ways of further research are outlined.
132 citations
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TL;DR: In this paper, the voltage response of a dc SQUID can be substantially linearized by the introduction of a nonlinear inductance, which can be easily formed using Josephson junction inductance.
Abstract: We show that the voltage response of a dc SQUID can be substantially linearized by the introduction of a nonlinear inductance. The inductance tuning allows us to achieve response linearity close to 120 dB. Such a nonlinear inductance can be easily formed using Josephson junction inductance. The additional junction and main inductance form a single-junction SQUID and hence the device can be called a bi-SQUID. To obtain high dynamic range commensurate to the high response linearity, one can use a serial array of nonlinear inductance dc SQUIDs. Experimental studies of a single bi-SQUID and serial arrays of bi-SQUIDs are reported and discussed.
86 citations
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TL;DR: In this article, a theoretical study of magnetic SIsFS Josephson junctions was performed, where S is a bulk superconductor, F is a thin superconducting film, I is a metallic ferromagnet and I is an insulator.
Abstract: Motivated by recent progress in the development of cryogenic memory compatible with single flux quantum (SFQ) circuits, we have performed a theoretical study of magnetic SIsFS Josephson junctions, where “S” is a bulk superconductor, “s” is a thin superconducting film, “F” is a metallic ferromagnet, and “I” is an insulator. We calculate the Josephson current as a function of s and F layers thickness, temperature, and exchange energy of F film. We outline several modes of operation of these junctions and demonstrate their unique ability to have large product of a critical current IC and a normal-state resistance RN in the π state, comparable to that in superconductor–insulator–superconductor tunnel junctions commonly used in SFQ circuits. We develop a model describing switching of the Josephson critical current in these devices by external magnetic field. The results are in good agreement with the experimental data for Nb-Al/AlO x -Nb-Pd0.99Fe0.01-Nb junctions
71 citations
01 Jan 2017
61 citations
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TL;DR: In this paper, superconductive antennas are used as active Electrically Small Antennas (ESA) with a critical current density of 4.5 kA/cm2 and experimentally evaluated.
Abstract: We introduce Superconductive Quantum Arrays and propose to use these structures as active Electrically Small Antennas (ESA). Several prototypes of the active ESA were fabricated using Nb process with a critical current density of 4.5 kA/cm2 and experimentally evaluated. The magnetic field to voltage transfer function linearity up to 70 dB was measured, and transfer factor dV/dB up to 6.5 mV/μT was observed for the ESA prototype containing 560 cells.
52 citations
Cited by
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01 Oct 1948
TL;DR: In this article, it was shown that a metal should be superconductive if a set of corners of a Brillouin zone is lying very near the Fermi surface, considered as a sphere, which limits the region in the momentum space completely filled with electrons.
Abstract: IN two previous notes1, Prof. Max Born and I have shown that one can obtain a theory of superconductivity by taking account of the fact that the interaction of the electrons with the ionic lattice is appreciable only near the boundaries of Brillouin zones, and particularly strong near the corners of these. This leads to the criterion that the metal should be superconductive if a set of corners of a Brillouin zone is lying very near the Fermi surface, considered as a sphere, which limits the region in the momentum space completely filled with electrons.
2,042 citations
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423 citations
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TL;DR: All-HTS Josephson superconducting tunnel junctions created by using a 500-pm-diameter focused beam of helium ions to directly write tunnel barriers into YBa2Cu3O(7-δ) (YBCO) thin films are demonstrated and the ability to control the barrier properties continuously from conducting to insulating by varying the irradiation dose is demonstrated.
Abstract: High-quality superconducting tunnel junctions operating above liquid nitrogen temperatures can be fabricated with a focused beam of helium ions that directly writes tunnel barriers in a cuprate superconductor.
172 citations
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TL;DR: It is concluded that VASO offers good reproducibility, high sensitivity and lower sensitivity than GE-BOLD to changes in larger vessels, making it a valuable tool for layer-dependent fMRI studies in humans.
159 citations
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TL;DR: In this paper, the authors consider operation principles of an energy-efficient superconductor logic and memory circuits with a short retrospective review of their evolution and analyze their shortcomings in respect to computer circuits design.
Abstract: The predictions of Moore's law are considered by experts to be valid until 2020 giving rise to "post-Moore's" technologies afterwards. Energy efficiency is one of the major challenges in high-performance computing that should be answered. Superconductor digital technology is a promising post-Moore's alternative for the development of supercomputers. In this paper, we consider operation principles of an energy-efficient superconductor logic and memory circuits with a short retrospective review of their evolution. We analyze their shortcomings in respect to computer circuits design. Possible ways of further research are outlined.
132 citations