Inhomogeneous charge states and electronic transport in manganites
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Inhomogeneous charge states and electronic transport in manganites
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| Creator |
Kagan, M.Yu.
Kugel, K.I. Rakhmanov, A.L. Khomskii, D.I. |
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Обзоp
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| 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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| Date |
2018-01-13T20:35:10Z
2018-01-13T20:35:10Z 2001 |
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| Type |
Article
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| Identifier |
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 http://dspace.nbuv.gov.ua/handle/123456789/128804 |
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en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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