Тип публикации: статья из журнала
Год издания: 2009
Идентификатор DOI: 10.3367/UFNe.0179.200908b.0837
Ключевые слова: Cobalt oxides, Lanthanides, Orbital degrees of freedom, Orbital ordering, Quasi-one-dimensional, Spin state, Superconducting compounds, Theoretical result, Calcium, Cobalt, Lanthanum, Oxide minerals, Perovskite, Spin dynamics, Superconductivity, Cobalt compounds
Аннотация: Complex cobalt oxides known as cobaltites are reviewed, including LnCoO(3)-based perovskite-structured rare-earth cobaltites (where Ln is lanthanum or a lanthanide), quasi-two-dimensional and quasi-one-dimensional cobaltites of the types LnCo(2)O(5+delta), La2CoO4, and Ca3Co2O8, and NaxCoO2 center dot yH(2)O superconducting compounПоказать полностьюds. Key experimental and theoretical results are presented, with emphasis on the interplay between charge, spin, and orbital degrees of freedom. Two problems of specific relevance to cobaltites - the spin state instability of Co3+ ions in LnCoO(3), and the nature of superconductivity in NaxCoO2 center dot yH(2)O - are also given significant attention.
Журнал: PHYSICS-USPEKHI
Выпуск журнала: Vol. 52, Is. 8
Номера страниц: 789-810
ISSN журнала: 10637869
Место издания: BRISTOL
Издатель: TURPION LTD