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Small and Large Polarons in Nickelates, Manganites, and Cuprates (Articolo in rivista)

Type

Label

Small and Large Polarons in Nickelates, Manganites, and Cuprates (Articolo in rivista) (literal)

Anno

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Alternative label

P. Calvani 1,P. Dore 1, S. Lupi 1, A. Paolone 1, P. Maselli 1, P. Giura 1, B. Ruzicka 2, S.-W. Cheong, 3 and W. Sadowski 4 (1997)
Small and Large Polarons in Nickelates, Manganites, and Cuprates
in Journal of superconductivity
(literal)

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P. Calvani 1,P. Dore 1, S. Lupi 1, A. Paolone 1, P. Maselli 1, P. Giura 1, B. Ruzicka 2, S.-W. Cheong, 3 and W. Sadowski 4 (literal)

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Rivista

Note

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1 INFM, Dipartimento di Fisica, Universitfi di Roma \"La Sapienza,\" Piazzale A. Moro 2, t-00185 Roma, Italy, 2 Daresbury Laboratories, Warrington WAK 4AD, United Kingdom. 3 Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974, U.S.A, 4 Faculty of Applied Physics and Mathematics, Technical University of Gdansk, G. Narutowicza 11/12, 80-592 Gdansk, Poland. (literal)

Titolo

Abstract

By comparing the optical conductivities of La1.67Sr0.33NiO4 (LSNO), Sr1.5La0.5MnO4 (SLMO), Nd2CuO4-y (NCO), and Nd1.96Ce0.04CuO4 (NCCO), we have identified a peculiar behavior of polarons in this cuprate family. Whereas in LSNO and SLMO small polarons localize into ordered structures below a transition temperature, in these cuprates the polarons appear to be large, and at low T their binding energy decreases. This reflects an increase of the polaron radius, which may trigger coherent transport. (literal)

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