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Manifestations of fine features of the density of states in the transport properties of KOs2O6статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Akrap A., Tutis E., Kazakov S.M., Zhigadlo N.D., Karpinski J., Forro L.
- Журнал: Physical Review B
- Том: 75
- Номер: 17
- Год издания: 2007
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 172501
- DOI: 10.1103/PhysRevB.75.172501
- Аннотация: We performed high-pressure transport measurements on high-quality single crystals of KOs2O6, a beta-pyrochlore superconductor. While the resistivity at high temperatures might approach saturation, there is no sign of saturation at low temperatures, down to the superconducting phase. The anomalous resistivity is accompanied by a nonmetallic behavior in the thermoelectric power (TEP) up to temperatures of at least 700 K, which also exhibits a broad hump with a maximum at 60 K. The pressure influences mostly the low-energy electronic excitations. A simple band model based on enhanced density of states in a narrow window around the Fermi energy (E-F) explains the main features of this unconventional behavior in the transport coefficients and its evolution under pressure.
- Добавил в систему: Казаков Сергей Михайлович