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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">8541</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">Properties of DC and Low-Frequency AC Conductivities of Single Crystals LiCu                  2O                  2+δ</article-title><trans-title-group xml:lang="ru"><trans-title>Особенности DC и низкочастотной AC проводимости в монокристаллах LiCu                  2O                  2+δ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tishchenko</surname><given-names>E A</given-names></name><name xml:lang="ru"><surname>Тищенко</surname><given-names>Эдуард Афанасьевич</given-names></name></name-alternatives><email>tishchenko@kapitza.ras.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dau</surname><given-names>H S</given-names></name><name xml:lang="ru"><surname>Дау</surname><given-names>Х Ш</given-names></name></name-alternatives><bio xml:lang="en">Department of Radiophysics</bio><bio xml:lang="ru">Кафедра радиофизики</bio><email>-</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Parfenov</surname><given-names>O E</given-names></name><name xml:lang="ru"><surname>Парфёнов</surname><given-names>Олег Евгеньевич</given-names></name></name-alternatives><email>parfenov@isssph.kiac.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bush</surname><given-names>A A</given-names></name><name xml:lang="ru"><surname>Буш</surname><given-names>Александр Андреевич</given-names></name></name-alternatives><email>aabush@yandex.ru</email><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kamenzev</surname><given-names>K E</given-names></name><name xml:lang="ru"><surname>Каменцев</surname><given-names>Константин Евгеньевич</given-names></name></name-alternatives><email>kostya_KE@yandex.ru</email><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">P.L. Kapitza Institute for Physical Problems</institution></aff><aff><institution xml:lang="ru">Институт Физических проблем им. П.Л. Капицы</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Peoples’ Friendship University of Russia</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Russian Scientific Centre “Kurchatov Institute”</institution></aff><aff><institution xml:lang="ru">Российский научный центр «Курчатовский Институт»</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Moscow State Institute of Radioengineering, Electronics, and Automation (Technical University)</institution></aff><aff><institution xml:lang="ru">Московский государственный институт радиотехники, электроники и автоматики</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2013-02-15" publication-format="electronic"><day>15</day><month>02</month><year>2013</year></pub-date><issue>2</issue><issue-title xml:lang="en">NO2 (2013)</issue-title><issue-title xml:lang="ru">№2 (2013)</issue-title><fpage>174</fpage><lpage>178</lpage><history><date date-type="received" iso-8601-date="2016-09-08"><day>08</day><month>09</month><year>2016</year></date></history><permissions><copyright-statement xml:lang="ru">Copyright ©; 2013, Тищенко Э.А., Дау Х.Ш., Парфёнов О.Е., Буш А.А., Каменцев К.Е.</copyright-statement><copyright-year>2013</copyright-year><copyright-holder xml:lang="ru">Тищенко Э.А., Дау Х.Ш., Парфёнов О.Е., Буш А.А., Каменцев К.Е.</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/8541">https://journals.rudn.ru/miph/article/view/8541</self-uri><abstract xml:lang="en">The temperature dependences of DC and low-frequency AC conductivities of single crystals LiCu                  2O                  2                  +                  δ in range from 4.5 K to 360 K were studied. The observed properties of conductivity indicated strong localization and inﬂuences of the spin, lattice and charge degrees of freedom on charge transport.</abstract><trans-abstract xml:lang="ru">Проведено детальное исследование температурных зависимостей DC и AC низкочастотной проводимости монокристаллов LiCu                  2O                  2                  +                  δ в диапазоне температур от 4.5 К до 360 К. Обнаруженные особенности проводимости свидетельствуют о сильной автолокализации и влиянии спиновых, решёточных и зарядовых степеней свободы на транспорт заряда.</trans-abstract><kwd-group xml:lang="en"><kwd>electron correlation</kwd><kwd>self-localization</kwd><kwd>hopping conduction</kwd><kwd>small polaron</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>электронная корреляция</kwd><kwd>автолокализация</kwd><kwd>прыжковая проводимость</kwd><kwd>малый полярон</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Erratum: Dimer Liquid State in the Quantum Antiferromagnet Compound LiCu2O2 / S. Zvyagin, G. Gao, Y. Xin et al. // Phys. Rev. B. — 2002. — Vol. 66. — P. 064424.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Competition between Helimagnetism and Commensurate Quantum Spin Correlations in LiCu2O2 / T. Masuda, A. Zheludev, A.A. Bush et al. // Phys. Rev. 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