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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Discrete and Continuous Models and Applied Computational Science</journal-id><journal-title-group><journal-title xml:lang="en">Discrete and Continuous Models and Applied Computational Science</journal-title><trans-title-group xml:lang="ru"><trans-title>Discrete and Continuous Models and Applied Computational Science</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2658-4670</issn><issn publication-format="electronic">2658-7149</issn><publisher><publisher-name xml:lang="en">Peoples' Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">16212</article-id><article-id pub-id-type="doi">10.22363/2312-9735-2017-25-3-266-275</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Physics and Astronomy</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Физика</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Magnetic Excitations of Graphene in 8-Spinor Realization of Chiral Model</article-title><trans-title-group xml:lang="ru"><trans-title>Магнитные возбуждения графена в рамках 8-спинорной реализации киральной модели</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Rybakov</surname><given-names>Yu P</given-names></name><name xml:lang="ru"><surname>Рыбаков</surname><given-names>Юрий Петрович</given-names></name></name-alternatives><bio xml:lang="en"><p>Department of Theoretical Physics and Mechanics</p></bio><bio xml:lang="ru"><p>Кафедра теоретической физики и механики</p></bio><email>soliton4@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Iskandar</surname><given-names>M</given-names></name><name xml:lang="ru"><surname>Искандар</surname><given-names>Мухаммад</given-names></name></name-alternatives><bio xml:lang="en"><p>Department of Theoretical Physics and Mechanics</p></bio><bio xml:lang="ru"><p>Кафедра теоретической физики и механики</p></bio><email>iskaandanr@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ahmed</surname><given-names>A B</given-names></name><name xml:lang="ru"><surname>Ахмед</surname><given-names>Абдуллахи Баппах</given-names></name></name-alternatives><bio xml:lang="en"><p>Department of Theoretical Physics and Mechanics</p></bio><bio xml:lang="ru"><p>Кафедра теоретической физики и механики</p></bio><email>garkuwaz@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Peoples’ Friendship University of Russia (RUDN University)</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2017-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2017</year></pub-date><volume>25</volume><issue>3</issue><issue-title xml:lang="en">VOL 25, NO3 (2017)</issue-title><issue-title xml:lang="ru">ТОМ 25, №3 (2017)</issue-title><fpage>266</fpage><lpage>275</lpage><history><date date-type="received" iso-8601-date="2017-06-06"><day>06</day><month>06</month><year>2017</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2017, Rybakov Y.P., Iskandar M., Ahmed A.B.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2017, Рыбаков Ю.П., Искандар М., Ахмед А.Б.</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="en">Rybakov Y.P., Iskandar M., Ahmed A.B.</copyright-holder><copyright-holder xml:lang="ru">Рыбаков Ю.П., Искандар М., Ахмед А.Б.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/miph/article/view/16212">https://journals.rudn.ru/miph/article/view/16212</self-uri><abstract xml:lang="en"><p>The simplest scalar chiral model of graphene suggested earlier and based on the SU(2) order parameter is generalized by including 8-spinor field as an additional order parameter for the description of spin (magnetic) excitations in graphene. As an illustration we study the interaction of the graphene layer with the external magnetic field. In the case of the magnetic field parallel to the graphene plane the diamagnetic effect is predicted, that is the weakening of the magnetic intensity in the volume of the material. However, for the case of the magnetic field orthogonal to the graphene plane the strengthening of the magnetic intensity is revealed in the central domain (at small r). Thus, the magnetic properties of the graphene prove to be strongly anisotropic.</p></abstract><trans-abstract xml:lang="ru"><p>Простейшая киральная модель графена, предложенная ранее и основанная на SU(2) параметре порядка, обобщается путем введения 8-спинорного поля как дополнительного параметра порядка для описания спиновых (магнитных) возбуждений в графене. В качестве иллюстрации мы изучаем взаимодействие графенового слоя с внешним магнитным полем. В случае магнитного поля, параллельного графеновой плоскости, предсказывается диамагнитный эффект, т. е. ослабление магнитной индукции внутри образца. Однако в случае магнитного поля, ортогонального графеновой плоскости, обнаруживается усиление магнитной индукции в центральной области (при малых r). Таким образом, магнитные свойства графена оказываются сильно анизотропными.</p></trans-abstract><kwd-group xml:lang="en"><kwd>graphene</kwd><kwd>spin excitations</kwd><kwd>chiral model</kwd><kwd>8-spinor</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>графен</kwd><kwd>спиновые возбуждения</kwd><kwd>киральная модель</kwd><kwd>8-спинор</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">K.S. Novoselov, A.K. Geim, S.V. Morozov, D. Jiang, Y. Zhang, S. V. Dubonos, V. Grigorieva, A.A. 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