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Арутюнов Константин Юрьевич

Московский институт электроники и математики им. А.Н. Тихонова

Профиль на hse.ru ↗ тел.: +7 (495) 772-95-90 | 15240
Публикаций
88
Языков
4
Наград
9
Конференций
0
Профиль Публикации (88) Курсы (8)

Профессиональные интересы

квантовая наноэлектроникапреподавание физики

Должности

  • Главный научный сотрудник — Московский институт электроники и математики им. А.Н. Тихонова, Научно-учебная лаборатория квантовой наноэлектроники
  • Ведущий научный сотрудник — Московский институт электроники и математики им. А.Н. Тихонова, Научно-учебная лаборатория квантовой наноэлектроники
  • Заведующий лабораторией — Московский институт электроники и математики им. А.Н. Тихонова, Научно-учебная лаборатория квантовой наноэлектроники
  • Профессор — Московский институт электроники и математики им. А.Н. Тихонова, Департамент электронной инженерии
  • Старший научный сотрудник — Московский институт электроники и математики им. А.Н. Тихонова, Департамент электронной инженерии

Био

  • · Начал работать в НИУ ВШЭ в 2014 году.
  • · Научно-педагогический стаж: 41 год.

Образование

  • 2013 · Доктор физико-математических наук
  • 1989 · Кандидат физико-математических наук
  • 1985 · Специалитет: Московский государственный университет им. М.В. Ломоносова, специальность «Физика», квалификация «Физик»

Опыт работы

  • · Файл (PDF, 157 Кб)

Награды и поощрения

  • · Благодарность ректора НИУ ВШЭ (март 2022)
  • · Благодарственное письмо первого проректора НИУ ВШЭ (январь 2021)
  • · Благодарность МИЭМ НИУ ВШЭ (май 2018)
  • · Надбавка за публикации, вносящие особый вклад в международную научную репутацию НИУ ВШЭ (2022–2025)
  • · Надбавка за публикацию в международном рецензируемом научном издании (2021–2022, 2020–2022, 2019–2020, 2017–2019)
  • · Надбавка за регулярные публикации в международных рецензируемых научных изданиях (2025–2030)
  • · Надбавка за статью в зарубежном рецензируемом журнале (2014–2016)
  • · Лучший преподаватель — 2024–2025, 2022, 2015–2019
  • · Победитель Конкурса лучших русскоязычных научных и научно-популярных работ работников НИУ ВШЭ – 2022

Гранты и проекты

  • — · Исследование квантовых размерных эффектов в металлических наноструктурах, ПНФ (2015)

Идентификаторы исследователя

Публикации (88)

The enhancement of the critical temperature in thin aluminium films

2019 · CHAPTER · en

It is well known that new effects appear in superconductors with the reduction of their size. Among them one is the most interesting – phenomenon of changing of critical temperature. It can be both decrease and increase in different metals, however, despite the number of existing works, there is still no generally accepted conception of what is exactly the origin of this effect. At the moment it is more or less clear, that this is a rather complicated mechanism, which is influenced by many factors, particularly connected with the sample’s manufacturing. Nevertheless, we suppose even after minimization of all impacts, the temperature of superconducting transition shifts anyway because of quantum size effect. We present here the results of the investigation of high-quality polycrystalline aluminum films and demonstrate the presence of quantum-confinement process that was not considered earlier. © 2019 International Institute of Refrigeration. All rights reserved.

DOI ↗

Smearing of electron density of states in quasi-one-dimensional superconducting channels due to quantum phase fluctuations

2018 · ARTICLE · en

Quasi-one-dimensional superconducting channels host sound-like plasma modes propagating along the which are associated with fluctuations of the phase of the superconducting order parameter (Mooiji and 1985) [5]. Interaction between these electromagnetic excitations and charge carriers affects the electron density of states (DOS). I-V characteristics of tunnel S1-I-S2 junctions, where superconducting S2 electrode nanowire in the regime of quantum fluctuations have been studied. The observed broadening of the I-V dependencies at the gap edge is interpreted as the renormalization of DOS. The results are in reasonable agreement with the model, taking into consideration plasma modes in quasi-one-dimensional superconductors.

DOI ↗ PDF ↗

Relaxation of Nonequilibrium Quasiparticles in Mesoscopic Size Superconductors

2018 · ARTICLE · en

Rapid development of micro- and nanofabrication methods have provoked interest and enabled experimental studies of electronic properties of a vast class of (sub)micrometersize solid state systems. Mesoscopic-size hybrid structures, containing superconducting elements, have become interesting objects for basic research studies and various applications, ranging from medical and astrophysical sensors to quantum computing. One of the most important aspects of physics, governing the behavior of such systems, is the finite concentration of nonequilibrium quasiparticles, present in a superconductor even well below the temperature of superconducting transition. Those nonequilibrium excitations might limit the performance of a variety of superconducting devices, like superconducting qubits, singleelectron turnstiles and microrefrigerators. On the contrary, in some applications, like detectors of electromagnetic radiation, the nonequilibrium state is essential for their operation. It is therefore of vital importance to study the mechanisms of nonequilibrium quasiparticle relaxation in superconductors of mesoscopic dimensions, where the whole structure can be considered as an ‘interface’. At early stages of research the problem was mostly studied in relatively massive systems and at high temperatures close to the critical temperature of a superconductor. We review the recent progress in studies of nonequilibrium quasiparticle relaxation in superconductors including the low temperature limit. We also discuss the open physical questions and perspectives of development in the field.

DOI ↗ PDF ↗

Quantum charge dynamics in quasi-one-dimensional superconductors

2018 · ARTICLE · en

Volt-ampere characteristics of narrow superconducting titanum wires have been studied experimentally. The narrowest specimens measured by means of high-resistance contacts have revealed a behavior nontrivial for superconductors: the Coulomb blockade. The Coulomb gap size correlates with the frequency of quantum phase slips. The observation confirms the identity of quantum dynamics of charge in the Josephson junctions and in the quasi-one-dimensional superconducting channels in the regime of quantum fluctuations of the order parameter.

DOI ↗ PDF ↗

Квантовая динамика заряда в квазиодномерных сверхпроводниках

2018 · ARTICLE · ru

Экспериментально исследовались вольт-амперные характеристики тонких сверхпроводящих нанопроводов из титана. Наиболее тонкие образцы, измеряемые высокомными контактами, обнаружили нетривиальное для сверхпроводника поведение: кулоновскую блокаду. Величина кулоновской щели коррелирует с частотой квантовых проскальзываний фазы. Наблюдение подтверждает идентичность квантовой динамики заряда в джозефсоновских контактах и в квазиодномерных сверхпроводящих каналах в режиме квантовых флуктуаций параметра порядка.

DOI ↗

Examination of cryogenic filters for multistage RF filtering in ultralow temperature experiments

2018 · ARTICLE · en

Cryo-filters are essential while studying electronic properties of nanoscale structures at very low temperatures. In this report we present the simple measuring methodology and experimental impedance characteristics of customized lumped filters cooled down to 4.2K in the 10 Hz-500 MHz frequency range. In particular, we tested the home-made permalloy-core RL filters, the MurataTMChip Ferrite Bead filter, and the ToshibaTMAmobeadsTMcores. We use the high-frequency generalization of four-terminal sensing method to account for the wiring retardation effects, which are important when working with ultralow temperature systems.

DOI ↗ PDF ↗

CRITICAL TEMPERATURE IN ALUMINUM FILMS

2018 · CHAPTER · en

Even back in 1938 an increase of the superconducting critical temperature with a reduction of an Al film thickness was observed, while some other superconductors exhibit an opposite dependence[1,2]. Despite the long history of studying, the nature of this size-effect is still disputable. Presumably, origin of that effect is attributed to amorphous phase, impurities or other essential inhomogeneities in crystal structure of the samples[3]. Anyway, it has been investigated mainly with highly disordered films, but virtually unexplored for ultrathin monocrystalline structures. Besides, there was no strict control of purity and structure of samples. There is hypothesis that if you take pure monocrystal film of any thickness there will not be difference of superconductive critical temperature from the bulk. However, it is still not confirmed neither as disproved because of complexity of fabrication and quality control. Our colleges from Greece manufactured samples of different thickness (from 10 to 100nm), using molecular beam epitaxy method. We control their structure with atomic -force and scanning electron Microscopy(AFM, SEM) and angle-resolved photoemission spectroscopy (ARPES). We have performed investigation of thickness dependence of critical temperature in atomic pure monocrystal aluminum films. All measurements was set in He-3 based cryo-insert, which is capable to obtain temperature down to 300 mK. To improve accuracy of temperature measurements our thermometers was additionally calibrated by reference point of superconducting transition in bulk aluminum samples. To avoid influence of noises setup was equipped with EMS- filters.

CRITICAL TEMPERATURE IN ALUMINUM FILMS

2018 · CHAPTER · en

Even back in 1938 an increase of the superconducting critical temperature with a reduction of an Al film thickness was observed, while some other superconductors exhibit an opposite dependence[1,2]. Despite the long history of studying, the nature of this size-effect is still disputable. Presumably, origin of that effect is attributed to amorphous phase, impurities or other essential inhomogeneities in crystal structure of the samples[3]. Anyway, it has been investigated mainly with highly disordered films, but virtually unexplored for ultrathin monocrystalline structures. Besides, there was no strict control of purity and structure of samples. There is hypothesis that if you take pure monocrystal film of any thickness there will not be difference of superconductive critical temperature from the bulk. However, it is still not confirmed neither as disproved because of complexity of fabrication and quality control. Our colleges from Greece manufactured samples of different thickness (from 10 to 100nm), using molecular beam epitaxy method. We control their structure with atomic -force and scanning electron Microscopy(AFM, SEM) and angle-resolved photoemission spectroscopy (ARPES). We have performed investigation of thickness dependence of critical temperature in atomic pure monocrystal aluminum films. All measurements was set in He-3 based cryo- insert, which is capable to obtain temperature down to 300 mK. To improve accuracy of temperature measurements our thermometers was additionally calibrated by reference point of superconducting transition in bulk aluminum samples. To avoid influence of noises setup was equipped with EMS- filters. This project is supported by The Ministry of Education and Science of the Russian Federation, project “RFMEF161717X0001” .

PDF ↗

Junctionless Cooper pair transistor

2017 · ARTICLE · en

Quantum phase slip (QPS) is the topological singularity of the complex order parameter of a quasi-one- dimensional superconductor: momentary zeroing of the modulus and simultaneous ’slip’ of the phase by ±2 π. The QPS event(s) are the dynamic equivalent of tunneling through a conventional Josephson junction containing static in space and time weak link(s). Here we demonstrate the operation of a su- perconducting single electron transistor ( Cooper pair transistor ) without any tunnel junctions. Instead a pair of thin superconducting titanium wires in QPS regime was used. The current–voltage characteristics demonstrate the clear Coulomb blockade with magnitude of the Coulomb gap modulated by the gate po- tential. The Coulomb blockade disappears above the critical temperature, and at low temperatures can be suppressed by strong magnetic field.

DOI ↗ PDF ↗

Куперовский транзистор не содержащий туннельных контактов

2017 в печати · ARTICLE · en

Quantum phase slip (QPS) is the topological singularity of the complex order parameter of a quasi-one- dimensional superconductor: momentary zeroing of the modulus and simultaneous ’slip’ of the phase by ±2 π. The QPS event(s) are the dynamic equivalent of tunneling through a conventional Josephson junction containing static in space and time weak link(s). Here we demonstrate the operation of a su- perconducting single electron transistor ( Cooper pair transistor ) without any tunnel junctions. Instead a pair of thin superconducting titanium wires in QPS regime was used. The current–voltage characteristics demonstrate the clear Coulomb blockade with magnitude of the Coulomb gap modulated by the gate po- tential. The Coulomb blockade disappears above the critical temperature, and at low temperatures can be suppressed by strong magnetic field.

DOI ↗ PDF ↗

Курсы (8)