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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">mateltech</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Материалы электронной техники</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya Vysshikh Uchebnykh Zavedenii. Materialy Elektronnoi Tekhniki = Materials of Electronics Engineering</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1609-3577</issn><issn pub-type="epub">2413-6387</issn><publisher><publisher-name>MISIS</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/1609-3577-2019-4-290-297</article-id><article-id custom-type="elpub" pub-id-type="custom">mateltech-356</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Математическое моделирование в материаловедении электронных компонентов</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICAL MODELING IN MATERIALS SCIENCE OF ELECTRONIC COMPONENTS</subject></subj-group></article-categories><title-group><article-title>Осцилляции Ааронова—Бома и распределения равновесных токов в открытой квантовой точке и кольцевом интерферометре</article-title><trans-title-group xml:lang="en"><trans-title>Aharonov—Bohm oscillations and distributions of equilibrium current in open quantum dot and ring interferometer</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ткаченко</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Tkachenko</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">otkach@isp.nsc.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бакшеев</surname><given-names>Д. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Baksheev</surname><given-names>D. G.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">bd@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ткаченко</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Tkachenko</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">vtkach@isp.nsc.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Институт физики полупроводников им. А.В. Ржанова СО РАН, &#13;
просп. Акад. Лаврентьева, д. 13, Новосибирск, 630090, Россия<country>Россия</country></aff><aff xml:lang="en">Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences,&#13;
13 Akad. Lavrent’eva Ave., Novosibirsk, 630090, Russia<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Новосибирский государственный университет, &#13;
ул. Пирогова, д. 1, Новосибирск, 630090, Россия<country>Россия</country></aff><aff xml:lang="en">Novosibirsk State University,&#13;
1 Pirogova Str., Novosibirsk, 630090, Russia<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru">Институт физики полупроводников им. А.В. Ржанова СО РАН, &#13;
просп. Акад. Лаврентьева, д. 13, Новосибирск, 630090, Россия;&#13;
Новосибирский государственный университет, &#13;
ул. Пирогова, д. 1, Новосибирск, 630090, Россия<country>Россия</country></aff><aff xml:lang="en">Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences,&#13;
13 Akad. Lavrent’eva Ave., Novosibirsk, 630090, Russia;&#13;
Novosibirsk State University,&#13;
1 Pirogova Str., Novosibirsk, 630090, Russia<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>29</day><month>07</month><year>2020</year></pub-date><volume>22</volume><issue>4</issue><fpage>290</fpage><lpage>297</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ткаченко О.А., Бакшеев Д.Г., Ткаченко В.А., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Ткаченко О.А., Бакшеев Д.Г., Ткаченко В.А.</copyright-holder><copyright-holder xml:lang="en">Tkachenko O.A., Baksheev D.G., Tkachenko V.A.</copyright-holder><license license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://met.misis.ru/jour/article/view/356">https://met.misis.ru/jour/article/view/356</self-uri><abstract><p>Методом неравновесных функций Грина промоделирован магнитотранспорт в двух субмикронных устройствах, сформированных на основе структур GaAs/AlGaAs. В одночастичном приближении рассмотрено влияние перпендикулярного магнитного поля на квантовый транспорт в квазиодномерной квантовой точке и в интерферометре Ааронова—Бома. Численным расчетом найдены магнитополевые осцилляции двухтерминального контактанса устройств, распределения равновесных (персистентных) токов и магнитный момент, генерируемый в этих устройствах персистентными токами. Прослежены корреляции между магнитным моментом, магнитополевыми осцилляциями кондактанса и резонансами по энергии в заданном магнитном поле. Для квазиодномерной квантовой точки в диапазоне низких магнитных полей (0,05—0,4 Tл) обнаружены более или менее регулярные осцилляции кондактанса, подобные осцилляциям Аронова—Бома. В случае кольцевого интерферометра вклад в полный равновесный ток и магнитный момент при заданной энергии может резко меняться как по величине, так и по знаку при изменении магнитного поля в пределах одной осцилляции Ааронова—Бома. Показано, что кондактанс интерферометра определяется, скорее, не числом распространяющихся в кольце мод, а влиянием треугольных квантовых точек на входах в кольцо, вызывающих сильное отражение. Период вычисленных осцилляций Ааронова—Бома соответствует измеренным для этих устройств.</p></abstract><trans-abstract xml:lang="en"><p>Magnetotransport in submicron devices formed on the basis of GaAs/AlGaAs structures is simulated by the method of nonequilibrium Green functions. In the one-particle approximation, the influence of a perpendicular magnetic field on electron transmission through a quasi-one-dimensional quantum dot and the Aharonov—Bohm interferometer is considered. Two-terminal conductance and magnetic moment of the devices are calculated. Two-dimensional patterns of equilibrium (persistent) currents are obtained. The correlations between energy dependences of magnetic moment and conductance are considered. For the quasi-one-dimensional quantum dot, regular conductance oscillations similar to the ABOs were found at low magnetic fields (0.05—0.4 T). In the case of a ring interferometer, the contribution to the total equilibrium current and magnetic moment at a given energy can change sharply both in magnitude and in sign when the magnetic field changes within the same Aharonov—Bohm oscillation. The conductance through the interferometer is determined not by the number of propagating modes, but rather by the influence of triangular quantum dots at the entrances to the ring, causing back scattering. Period of calculated ABOs corresponds to that measured for these devices.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>баллистическая квантовая точка</kwd><kwd>кольцевой электронный интерферометр</kwd><kwd>кондактанс</kwd><kwd>равновесный ток</kwd><kwd>магнитный момент</kwd><kwd>осцилляции Ааронова—Бома</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ballistic quantum dot</kwd><kwd>electron ring interferometer</kwd><kwd>conductance</kwd><kwd>equilibrium current</kwd><kwd>magnetic moment</kwd><kwd>Aharonov—Bohm oscillations</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Работа поддержана грантом № 19-72-30023 Российского научного фонда. Расчеты с использованием вычислительных ресурсов МСЦ РАН выполнялись по Гос. заданию № 0306-2019-0011.</funding-statement></funding-group><funding-group xml:lang="en"><funding-statement>This work was supported by the Russian Science Foundation, grant No. 19-72-30023. Calculations using the computing resources of the Joint Supercomputer Center of the Russian Academy of Sciences were carried out in accordance with State Order No. 0306-2019-0011.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Bykov A. A., Kvon Z. D., Ol'shanetskii E. B., Litvin L. V., Nastaushev Yu. V., Mansurov V. G., Migal' V. P., Moshchenko S. P., Plyukhin V. G. Quasiballistic electronic interferometer // JETP Letters. 1993. V. 57, Iss. 9. P. 613—616.</mixed-citation><mixed-citation xml:lang="en">Bykov A. A., Kvon Z. D., Ol'shanetskii E. B., Litvin L. V., Nastaushev Yu. V., Mansurov V. G., Migal' V. P., Moshchenko S. P., Plyukhin V. G. Quasiballistic electronic interferometer. 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