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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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">dan-439</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>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>ТУННЕЛИРОВАНИЕ ЧЕРЕЗ ГЛАДКИЙ ПАРАБОЛИЧЕСКИЙ ДВОЙНОЙ БАРЬЕР</article-title><trans-title-group xml:lang="en"><trans-title>TUNNELING THROUGH A SMOOTH PARABOLIC DOUBLE BARRIER</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>Баран</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Baran</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. физ.-мат. наук, научный сотрудник</p></bio><bio xml:lang="en"><p>Ph. D. (Physics and Mathematics), Researcher</p></bio><email xlink:type="simple">a.baran@dragon.bas-net.by</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>Кудряшов</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kudryashov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. физ.-мат. наук, заместитель заведующего лабораторией</p></bio><bio xml:lang="en"><p>Ph. D. (Physics and Mathematics), Deputy Head of the Laboratory</p></bio><email xlink:type="simple">kudryash@dragon.bas-net.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физики им. Б. И. Степанова Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>05</day><month>10</month><year>2017</year></pub-date><volume>61</volume><issue>4</issue><fpage>46</fpage><lpage>51</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Баран А.В., Кудряшов В.В., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Баран А.В., Кудряшов В.В.</copyright-holder><copyright-holder xml:lang="en">Baran A.V., Kudryashov V.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" 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://doklady.belnauka.by/jour/article/view/439">https://doklady.belnauka.by/jour/article/view/439</self-uri><abstract><p>Дано точное описание туннелирования для гладкого симметричного двойного барьера, который построен с помощью как параболических, так и перевернутых параболических потенциалов. Найдено аналитическое выражение для коэффициента прохождения. Получено условие резонансного туннелирования. Представлена зависимость коэффициента прохождения от энергии налетающей частицы для различных значений параметров двойного барьера. Установлено, что число резонансов растет с увеличением ширины барьеров и расстояния между барьерами. Непрерывные волновые функции выражены через вырожденные гипергеометрические функции. Показаны реальные и мнимые составляющие волновых функций при резонансных значениях энергии. Предложенный параболический потенциал расширяет весьма ограниченный перечень точно решаемых моделей, которые описывают туннелирование через двойные барьеры. Варьируемая форма рассматриваемого двойного барьера дает дополнительные возможности моделирования процессов туннелирования.</p><sec><title> </title><p> </p></sec><sec><title> </title><p> </p></sec></abstract><trans-abstract xml:lang="en"><p>The exact description of tunneling is given for a smooth symmetric double barrier which is constructed with the help of both parabolic and inverted parabolic potentials. The analytical expression for transmission coefﬁcient is found. The resonant tunneling condition is obtained. The dependence of transmission coefﬁcient on incident particle energy is presented for different values of double barrier parameters. It is established that the number of resonances increases with growing the width of barriers and the distance between barriers. The continuous wave functions are expressed in terms of the conﬂuent hypergeometric functions. The real and imaginary components of wave functions are shown at the resonance values of energy. The proposed smooth parabolic potential extends a very limited list of exactly solvable models that describe tunneling through double barriers. The variable shape of the considered double barrier gives the supplementary possibilities to simulate tunneling processes.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>туннелирование</kwd><kwd>параболический двойной барьер</kwd><kwd>коэффициент прохождения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>tunneling</kwd><kwd>parabolic double barrier</kwd><kwd>transmission coefﬁcient</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Chang, L. L. Resonant tunneling in semiconductor double barriers / L. L. Chang, L. Esaki, R. Tsu // Appl. Phys. Lett. – 1974. – Vol. 24, N 12. – P. 593–595. doi.org/10.1063/1.1655067</mixed-citation><mixed-citation xml:lang="en">Chang L. L., Esaki L., Tsu R. 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