Superconducting properties of a boson-exchange model of doped graphene
We study the superconducting properties of a doped one-layer graphene by using a model in which the interparticle attraction is caused by a boson (phonon-like) excitations. We study the dependencies of the superconducting gap D and the mean-field critical temperature TcMF on the carrier density, att...
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| Опубліковано в: : | Физика низких температур |
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| Дата: | 2009 |
| Автори: | , |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2009
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| Теми: | |
| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/117304 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Superconducting properties of a boson-exchange model of doped graphene / V.M. Loktev, V. Turkowski // Физика низких температур. — 2009. — Т. 35, № 8-9. — С. 805-811. — Бібліогр.: 20 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862722712772804608 |
|---|---|
| author | Loktev, V.M. Turkowski, V. |
| author_facet | Loktev, V.M. Turkowski, V. |
| citation_txt | Superconducting properties of a boson-exchange model of doped graphene / V.M. Loktev, V. Turkowski // Физика низких температур. — 2009. — Т. 35, № 8-9. — С. 805-811. — Бібліогр.: 20 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | We study the superconducting properties of a doped one-layer graphene by using a model in which the interparticle attraction is caused by a boson (phonon-like) excitations. We study the dependencies of the superconducting gap D and the mean-field critical temperature TcMF on the carrier density, attraction strength and the characteristic (Debye) bosonic frequency. In addition, we study the temperature-carrier density phase diagram of the model by taking into account the thermal fluctuations of the order parameter. We show that the fluctuations result in a significant suppression of TcMF, such that the real (Berezinskii– Kosterlitz–Thouless) critical temperature Tc is much lower than TcMF. The region Tc < T < TcMF is characterized by a finite density of states at the Fermi level (the pseudogap phase). We show that the width of the temperature interval of the pseudogap phase strongly depends on the model parameters—carrier concentration, attraction amplitude, and boson frequency.
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| first_indexed | 2025-12-07T18:37:17Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-117304 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-12-07T18:37:17Z |
| publishDate | 2009 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Loktev, V.M. Turkowski, V. 2017-05-21T19:27:14Z 2017-05-21T19:27:14Z 2009 Superconducting properties of a boson-exchange model of doped graphene / V.M. Loktev, V. Turkowski // Физика низких температур. — 2009. — Т. 35, № 8-9. — С. 805-811. — Бібліогр.: 20 назв. — англ. 0132-6414 Pacs: 74.20.–z, 74.78.–w, 74.40. +k, 73.63.–b https://nasplib.isofts.kiev.ua/handle/123456789/117304 We study the superconducting properties of a doped one-layer graphene by using a model in which the interparticle attraction is caused by a boson (phonon-like) excitations. We study the dependencies of the superconducting gap D and the mean-field critical temperature TcMF on the carrier density, attraction strength and the characteristic (Debye) bosonic frequency. In addition, we study the temperature-carrier density phase diagram of the model by taking into account the thermal fluctuations of the order parameter. We show that the fluctuations result in a significant suppression of TcMF, such that the real (Berezinskii– Kosterlitz–Thouless) critical temperature Tc is much lower than TcMF. The region Tc < T < TcMF is characterized by a finite density of states at the Fermi level (the pseudogap phase). We show that the width of the temperature interval of the pseudogap phase strongly depends on the model parameters—carrier concentration, attraction amplitude, and boson frequency. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Электронные свойства проводящих систем Superconducting properties of a boson-exchange model of doped graphene Article published earlier |
| spellingShingle | Superconducting properties of a boson-exchange model of doped graphene Loktev, V.M. Turkowski, V. Электронные свойства проводящих систем |
| title | Superconducting properties of a boson-exchange model of doped graphene |
| title_full | Superconducting properties of a boson-exchange model of doped graphene |
| title_fullStr | Superconducting properties of a boson-exchange model of doped graphene |
| title_full_unstemmed | Superconducting properties of a boson-exchange model of doped graphene |
| title_short | Superconducting properties of a boson-exchange model of doped graphene |
| title_sort | superconducting properties of a boson-exchange model of doped graphene |
| topic | Электронные свойства проводящих систем |
| topic_facet | Электронные свойства проводящих систем |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/117304 |
| work_keys_str_mv | AT loktevvm superconductingpropertiesofabosonexchangemodelofdopedgraphene AT turkowskiv superconductingpropertiesofabosonexchangemodelofdopedgraphene |