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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)

Corrigendum: The quantum phase slip phenomenon in superconducting nanowires with a low-Ohmic environment

2013 · ARTICLE · en

On the second page, after equation (1), the statement ‘. . . where RN is the normal state resistance, RQ D h=2e D 6:45 k is the superconducting quantum resistance, . . . ’ contains a misprint. The correct expression is RQ D h=.2e/2 D 6:45 k.

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Nanoscale Superconductivity: physics and applications

2013 · CHAPTER · en

Conventional superconductivity in bulk objects is characterized by three phenomenological features: zero resistivity, perfect diamagnetism ( Meissner effect) and energy gap in the excitation spectrum. In this paper we demonstrate that these attributes of superconductivity do not apply to ultra-small objects governed by the essentially nanoscale phenomenon which is quantum fluctuations. The observation results in fundamental limitations of utilization of superconducting elements in nanoelectronic circuits. However, together with this rather pessimistic conclusion, the indicated size phenomena lead to a new class of nanoscale devices and applications.

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Coherent quantum phase slip

2012 · ARTICLE · en

A hundred years after the discovery of superconductivity, one fundamental prediction of the theory, coherent quantum phase slip (CQPS), has not been observed. CQPS is a phenomenon exactly dual1 to the Josephson effect; whereas the latter is a coherent transfer of charges between superconducting leads2,3, the former is a coherent transfer of vortices or fluxes across a superconducting wire. In contrast to previously reported observations4–8 of incoherent phase slip, CQPS has been only a subject of theoretical study9–12. Its experimental demonstration is made difficult by quasiparticle dissipation due to gapless excitations in nanowires or in vortex cores. This difficulty might be overcome by using certain strongly disordered superconductors near the superconductor– insulator transition. Here we report direct observation of CQPS in a narrow segment of a superconducting loop made of strongly disordered indium oxide; the effect is made manifest through the superposition of quantum states with different numbers of flux quanta13. As with the Josephson effect, our observation should lead to new applications in superconducting electronics and quantum metrology1,10,11

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Quantum phase slip phenomenon in ultra-narrow superconducting nanorings

2012 · ARTICLE · en

The smaller the system, typically - the higher is the impact of fluctuations. In narrow superconducting wires sufficiently close to the critical temperature Tc thermal fluctuations are responsible for the experimentally observable finite resistance. Quite recently it became possible to fabricate sub-10 nm superconducting structures, where the finite resistivity was reported within the whole range of experimentally obtainable temperatures. The observation has been associated with quantum fluctuations capable to quench zero resistivity in superconducting nanowires even at temperatures T-->0. Here we demonstrate that in tiny superconducting nanorings the same phenomenon is responsible for suppression of another basic attribute of superconductivity - persistent currents - dramatically affecting their magnitude, the period and the shape of the current-phase relation. The effect is of fundamental importance demonstrating the impact of quantum fluctuations on the ground state of a macroscopically coherent system, and should be taken into consideration in various nanoelectronic applications

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Coulomb Blockade and Bloch Oscillations in Superconducting Ti Nanowires

2012 · ARTICLE · en

Quantum fluctuations in quasi-one-dimensional superconducting channels leading to spontaneous changes of the phase of the order parameter by 2, alternatively called quantum phase slips (QPS), manifest themselves as the finite resistance well below the critical temperature of thin superconducting nanowires and the suppression of persistent currents in tiny superconducting nanorings. Here we report the experimental evidence that in a current-biased superconducting nanowire the same QPS process is responsible for the insulating state—the Coulomb blockade. When exposed to rf radiation, the internal Bloch oscillations can be synchronized with the external rf drive leading to formation of quantized current steps on the I-V characteristic. The effects originate from the fundamental quantum duality of a Josephson junction and a superconducting nanowire governed by QPS—the QPS junction

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Evidence of quantum phase slip effect in titanium nanowires

2012 · ARTICLE · en

Electron transport properties of titanium nanowires were experimentally studied. Below the effective diameter 50nm all samples demonstrated a pronounced broadening of the R(T ) dependencies, which cannot be accounted for by thermal fluctuations. Extensive microscopic and elemental analyses indicate the absence of structural or/and geometrical imperfections capable of broadening the R(T ) transition to such an extent. We associate the effect with quantum fluctuations of the order parameter

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The quantum phase slip phenomenon in superconducting nanowires with a low-Ohmic environment

2012 · ARTICLE · en

In a number of recent experiments it has been demonstrated that in ultra-narrow superconducting channels quantum fluctuations of the order parameter, alternatively called quantum phase slips, are responsible for the finite resistance well below the critical temperature. Acceptable agreement between those experiments and the models describing quantum fluctuations in quasi-one-dimensional superconductors has been established. However, the very concept of phase slip is justified when these fluctuations are relatively rare events, meaning that the effective resistance of the system should be much smaller than the normal state equivalent. In this paper we study the limit of the strong quantum fluctuations where the existing models are not applicable. In the particular case of ultra-thin titanium nanowires, it is demonstrated that below the expected critical temperature the resistance does not demonstrate any trend towards the conventional for a superconductor zero-resistivity state even at negligibly small measuring currents. The application of a small magnetic field leads to an unusual negative magnetoresistance, which becomes more pronounced at lower temperatures. The origin of the negative magnetoresistance effect is not clear.

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Spatially resolved measurement of nonequilibrium quasiparticle relaxation in superconducting Al

2011 · ARTICLE · en

Spatially resolved relaxation of nonequilibrium quasiparticles in a superconductor at ultralow temperatures was experimentally studied. It was found that the quasiparticle injection through a tunnel junction results in the modification of the shape of the I-V characteristic of a remote "detector" junction. The effect depends on the temperature, injection current, and proximity to the injector. The phenomena can be understood in terms of the creation of quasiparticle charge and energy disequilibrium characterized by two different length scales Lambda(Q not asymptotic to) similar to 5 and Lambda(T not asymptotic to) similar to 40 mu m. The findings are in good agreement with existing phenomenological models, while more elaborate microscopic theory is mandatory for a detailed quantitative comparison with the experiment. The results are of fundamental importance for understanding electron transport phenomena in various nanoelectronic circuits.

DOI ↗ PDF ↗

Курсы (8)