Infrared response of ordered polarons in layered perovskites

Дата и время публикации : 1996-09-13T14:24:38Z

Авторы публикации и институты :
P. Calvani (INFM – Dipartimento di Fisica, Universita di Roma “La Sapienza”, Italy)
A. Paolone (INFM – Dipartimento di Fisica, Universita di Roma “La Sapienza”, Italy)
P. Dore (INFM – Dipartimento di Fisica, Universita di Roma “La Sapienza”, Italy)
S. Lupi (INFM – Dipartimento di Fisica, Universita di Roma “La Sapienza”, Italy)
P. Maselli (INFM – Dipartimento di Fisica, Universita di Roma “La Sapienza”, Italy)
P. G. Medaglia (INFM – Dipartimento di Fisica, Universita di Roma “La Sapienza”, Italy)
S-W. Cheong (AT&T Bell Laboratories, Murray Hill, NJ, U.S.A.)

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: File latex, 11 p. + 3 Figures, to appear on Phys. Rev. B (Rapid Commun.), 1 Oct. 1996. The figures will be faxed upon request. E-mail:p.calvani@caspur.it Fax: +39-6-4463158
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: We report on the infrared absorption spectra of three oxides where charged superlattices have been recently observed in diffraction experiments. In La$_{1.67}$Sr$_{0.33}$NiO$_4$, polaron localization is found to suppress the low-energy conductivity through the opening of a gap and to split the $E_{2u}$-$A_{2u}$ vibrational manifold of the oxygen octahedra. Similar effects are detected in Sr$_{1.5}$La$_{0.5}$MnO$_4$ and in La$_2$NiO$_{4+y}$, with peculiar differences related to the type of charge ordering.

Category: Physics