Mikhail Belogolovskii - Profile on Academia.edu (original) (raw)

Papers by Mikhail Belogolovskii

Manifestation of electron-phonon interaction effects on tunnel curves of normal junctions

Jetp Letters, Jun 1, 1975

Fundamentals

Wiley-VCH Verlag GmbH & Co. KGaA eBooks, Jan 30, 2015

Proximity Effect

digital Encyclopedia of Applied Physics, Dec 20, 2016

Metallofizika I Noveishie Tekhnologii, Jun 15, 2016

Оттиски доступны непосредственно от издателя Фотокопирование разрешено только в соответствии с ли... more Оттиски доступны непосредственно от издателя Фотокопирование разрешено только в соответствии с лицензией 2015 ИМФ (Институт металлофизики им. Г. В. Курдюмова НАН Украины) Напечатано в Украине.

Resistive spectroscopy study of localization effects in HTSC

Resistivity Switching in Binary and Complex Transition-Metal Oxides

Оксидні матеріали#N#електронної техніки –#N#отримання, властивості,#N#застосування : збірник#N#тез міжнародної наукової конференції, May 29, 2017

Resistance switching effects in perovskite oxides

Magnetic Field Sensor Based on a Single Josephson Junction With a Multilayer Ferromagnet/Normal Metal Barrier

IEEE Transactions on Applied Superconductivity, Aug 1, 2021

We report experimental studies of quantum-matter heterostructures based on a ferromagnet/normal m... more We report experimental studies of quantum-matter heterostructures based on a ferromagnet/normal metal multilayer proximitized by Nb superconducting electrodes to form a novel Josephson weak-link device that is highly sensitive to magnetic fields. The device is a single Josephson junction containing Al/Ni or Al/Py (Py: Ni80Fe20) multilayer structures, which manifests quasi-sinusoidal critical current oscillations resembling the response of a dc Superconducting Quantum Interference Device (SQUID). Our analysis shows that the field sensitivity of this novel device, as measured by the magnetic field needed to form one period of the oscillations, is about twice that reported for recent micro- or nano-SQUIDs. We present an analysis of the temperature dependence of the period of the oscillations and the Josephson critical current, as well as the background current. We believe that our devices are promising candidates for a new generation of magnetic field nanosensors.

Physical review applied, Jul 29, 2020

Physics-Uspekhi, Feb 28, 1993

The results of experimental studies of the interaction between electrons and crystal lattice vibr... more The results of experimental studies of the interaction between electrons and crystal lattice vibrations in high-temperature superconducting metal oxides are presented. Attention is directed mainly toward a critical analysis of the data obtained by means of tunneling spectroscopy.

Josephson junctions based on amorphous MoGe: prospects for use in superconducting electronics

Superconductor Science and Technology, Feb 4, 2022

We have fabricated and characterized all-MoGe Josephson junctions with a very thin Al/AlO x /(Al)... more We have fabricated and characterized all-MoGe Josephson junctions with a very thin Al/AlO x /(Al) barrier, where the amorphous MoGe films exhibit superconducting transition temperatures up to 7 K. Due to the uniformity of the surface morphology of the MoGe films, the junctions demonstrate high uniformity of their tunneling properties. The experimental data on the temperature dependence of the subgap current agree well with theoretical calculations. The results obtained imply that Josephson tunnel junctions based on amorphous superconductors are promising candidates for use in superconducting electronics, especially in applications requiring multiple stacked junctions or the creation of a nonequilibrium quasiparticle distribution.

Revealing the nature of two-level systems at a superconductor-insulator boundary

poster 3EPo2C-01International audienc

Probing long-range current-carrying edge modes by two quantum point contacts

Low Temperature Physics, Dec 1, 2021

The origin of anomalous current-carrying edge states in quasi-two-dimensional quantum samples wit... more The origin of anomalous current-carrying edge states in quasi-two-dimensional quantum samples with an insulating interior is currently mysterious. We propose to address this issue using a hybrid setup, an interferometric phase-sensitive configuration of two independent scanning probe tips, normal and superconducting, able to realize the quantum interference effect of quasiparticle currents moving in different directions along the metallic-like one-dimensional near-boundary channels. To simulate the dissipationless edge currents, we consider a quantum material with a simple Corbino disk geometry and analyze how the differential conductance spectrum depends on the distance between the two tips, the applied voltage bias, and the presence of a magnetic field. An essential difference between classical and quantum expectations should clarify the enigmatic origin of the long-range conducting modes observed in different materials at low temperatures. Strong dependence on the applied magnetic field can be useful for practical implementation of the quantum effects associated with the phase difference of electron wave functions in the ring geometry.

Possible observation of Leggett-like modes in a coherent two-phase medium

Low Temperature Physics, Jul 1, 2023

Spontaneous symmetry breaking is a ubiquitous phenomenon in physics responsible for various colle... more Spontaneous symmetry breaking is a ubiquitous phenomenon in physics responsible for various collective modes. Collective excitations predicted by Leggett in 1966 are specific for multiband superfluids and reflect oscillations of the relative phase of different band components. In this work, we argue that such modes should exist also in a multiphase medium with a coherent Josephson-like coupling between the different superconducting components. Point-contact experiments on superconducting ceramics formed by grains of two bismuth-based superconducting oxides with transition temperatures of about 70 and 100 K made it possible to reveal multiple periodic conductance peaks, which we have attributed to elastic scatterings by a Leggett-like mode inherent in the studied two-phase samples. We believe there should be a large group of superconducting materials where such modes could exist and assert that point-contact spectroscopy is one of the best ways to identify and characterize them.

arXiv (Cornell University), Sep 15, 2017

The Braess paradox encountered in classical networks is a counterintuitive phenomenon when the fl... more The Braess paradox encountered in classical networks is a counterintuitive phenomenon when the flow in a road network can be impeded by adding a new road or, more generally, the overall net performance can degrade after addition of an extra available choice. In this work, we discuss the possibility of a similar effect in a phase-coherent quantum transport and demonstrate it by example of a simple Y-shaped metallic fork. To reveal the Braess-like partial suppression of the charge flow in such device, it is proposed to transfer two outgoing arms into a superconducting state. We show that the differential conductance-vs-voltage spectrum of the hybrid fork structure varies considerably when the extra link between the two superconducting leads is added and it can serve as an indicator of quantum correlations which manifest themselves in the quantum Braess paradox.

Low Temperature Physics, Jul 1, 2017

Conventional Josephson metal-insulator-metal devices are inherently underdamped and exhibit hyste... more Conventional Josephson metal-insulator-metal devices are inherently underdamped and exhibit hysteretic current-voltage response due to a very high subgap resistance compared to that in the normal state. At the same time, overdamped junctions with single-valued characteristics are needed for most superconducting digital applications. The usual way to overcome the hysteretic behavior is to place an external low-resistance normal-metal shunt in parallel with each junction. Unfortunately, such solution results in a considerable complication of the circuitry design and introduces parasitic inductance through the junction. This paper provides a concise overview of some generic approaches that have been proposed in order to realize internal shunting in Josephson heterostructures with a barrier that itself contains the desired resistive component. The main attention is paid to self-shunted devices with local weak-link transmission probabilities so strongly disordered in the interface plane that transmission probabilities are tiny for the main part of the transition region between two superconducting electrodes, while a small part of the interface is well transparent. We consider the possibility of realizing a universal bimodal distribution function and emphasize advantages of such junctions that can be considered as a new class of self-shunted Josephson devices promising for practical applications in superconducting electronics operating at 4.2 K.

Mo-Re alloy: A new benchmark two-band superconductor

Low Temperature Physics, 2023

Multigap superconductivity, emerging in metals with several bands crossing the Fermi level, favor... more Multigap superconductivity, emerging in metals with several bands crossing the Fermi level, favors exotic superconducting orders that have no equivalent in a single-band counterpart. In this context, it is important to search for new materials with well-established two (or more) gaps having distinctly different sizes. In this work, we confirm previous statements and present new evidence to support the claim that Mo-Re alloy with a comparable concentration of the components is a two-band/two-gap superconductor. The differential conductance spectra obtained in point-contact experiments demonstrate the presence of a bosonic, undamped collective mode and its harmonics associated with the superconducting state. Following previous works on MgB2, we have identified these features as manifestations of the so-called Leggett mode arising due to relative phase fluctuations between two superconducting order parameters.

Low Temperature Physics, Aug 1, 2019

Specific features of Nd 3+ Kramers doublets' splitting in an antiferromagnetic crystal NdFe 3 (BO... more Specific features of Nd 3+ Kramers doublets' splitting in an antiferromagnetic crystal NdFe 3 (BO 3) 4 in an external magnetic field

Probing superconducting granularity using nonlocal four-probe measurements

European Physical Journal Plus, Jun 2, 2023

Metallofizika I Noveishie Tekhnologii, Dec 8, 2020