Inhomogeneous charge states and electronic transport in manganites
We analyze the interplay between charge ordering, magnetic ordering, and the tendency toward phase separation and its importance for the physics of manganites. A simple model of charge ordering is considered. It takes into account both the Coulomb repulsion at neighboring sites responsible for charg...
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| Опубліковано в: : | Физика низких температур |
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| Дата: | 2001 |
| Автори: | , , , |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2001
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/128804 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Inhomogeneous charge states and electronic transport in manganites
 
 Inhomogeneous charge states and electronic transport in manganites / M.Yu. Kagan, K.I. Kugel, A.L. Rakhmanov, D.I. Khomskii // Физика низких температур. — 2001. — Т. 27, № 8. — С. 815-825. — Бібліогр.: 31 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862750253499809792 |
|---|---|
| author | Kagan, M.Yu. Kugel, K.I. Rakhmanov, A.L. Khomskii, D.I. |
| author_facet | Kagan, M.Yu. Kugel, K.I. Rakhmanov, A.L. Khomskii, D.I. |
| citation_txt | Inhomogeneous charge states and electronic transport in manganites
 
 Inhomogeneous charge states and electronic transport in manganites / M.Yu. Kagan, K.I. Kugel, A.L. Rakhmanov, D.I. Khomskii // Физика низких температур. — 2001. — Т. 27, № 8. — С. 815-825. — Бібліогр.: 31 назв. — англ. |
| collection | DSpace DC |
| container_title | Физика низких температур |
| description | We analyze the interplay between charge ordering, magnetic ordering, and the tendency toward phase separation and its importance for the physics of manganites. A simple model of charge ordering is considered. It takes into account both the Coulomb repulsion at neighboring sites responsible for charge ordering and the essential magnetic interactions. It is shown explicitly that at any deviation from half-filling (n≠1/2) the system is unstable with respect to phase separation into charge-ordered regions with n=1/2 and metallic regions with smaller electron or hole density. A possible structure of this phase-separated state (metallic droplets in a charge-ordered matrix) is discussed. We construct the phase diagram reproducing the main features observed in real manganites. Based on the same physical picture, we also derive explicit expressions for the dc conductivity and noise power in the phase-separated state. It is shown that the noise spectrum has a nearly 1/f form in the low-frequency range.
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| first_indexed | 2025-12-07T21:04:55Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-128804 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0132-6414 |
| language | English |
| last_indexed | 2025-12-07T21:04:55Z |
| publishDate | 2001 |
| publisher | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| record_format | dspace |
| spelling | Kagan, M.Yu. Kugel, K.I. Rakhmanov, A.L. Khomskii, D.I. 2018-01-13T20:35:10Z 2018-01-13T20:35:10Z 2001 Inhomogeneous charge states and electronic transport in manganites
 
 Inhomogeneous charge states and electronic transport in manganites / M.Yu. Kagan, K.I. Kugel, A.L. Rakhmanov, D.I. Khomskii // Физика низких температур. — 2001. — Т. 27, № 8. — С. 815-825. — Бібліогр.: 31 назв. — англ. 0132-6414 PACS: 64.75.+g, 71.27.+a, 71.30.+h, 72.10.-d, 72.70.+m, 75.30.Vn https://nasplib.isofts.kiev.ua/handle/123456789/128804 We analyze the interplay between charge ordering, magnetic ordering, and the tendency toward phase separation and its importance for the physics of manganites. A simple model of charge ordering is considered. It takes into account both the Coulomb repulsion at neighboring sites responsible for charge ordering and the essential magnetic interactions. It is shown explicitly that at any deviation from half-filling (n≠1/2) the system is unstable with respect to phase separation into charge-ordered regions with n=1/2 and metallic regions with smaller electron or hole density. A possible structure of this phase-separated state (metallic droplets in a charge-ordered matrix) is discussed. We construct the phase diagram reproducing the main features observed in real manganites. Based on the same physical picture, we also derive explicit expressions for the dc conductivity and noise power in the phase-separated state. It is shown that the noise spectrum has a nearly 1/f form in the low-frequency range. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Обзоp Inhomogeneous charge states and electronic transport in manganites Article published earlier |
| spellingShingle | Inhomogeneous charge states and electronic transport in manganites Kagan, M.Yu. Kugel, K.I. Rakhmanov, A.L. Khomskii, D.I. Обзоp |
| title | Inhomogeneous charge states and electronic transport in manganites |
| title_full | Inhomogeneous charge states and electronic transport in manganites |
| title_fullStr | Inhomogeneous charge states and electronic transport in manganites |
| title_full_unstemmed | Inhomogeneous charge states and electronic transport in manganites |
| title_short | Inhomogeneous charge states and electronic transport in manganites |
| title_sort | inhomogeneous charge states and electronic transport in manganites |
| topic | Обзоp |
| topic_facet | Обзоp |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/128804 |
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