Intersite Coulomb Interactions in Quasi-One-Dimensional Copper Oxides

Kozo Okada; Akio Kotani

doi:10.1143/JPSJ.66.341

Intersite Coulomb Interactions in Quasi-One-Dimensional Copper Oxides

Kozo Okada, Akio Kotani

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

Intersite Coulomb interaction between Cu 3d and O 2p holes (U_pd) is shown to be important in analyzing the optical conductivity and the Cu 2p core-level X-ray photoemission spectrum (XPS) of one-dimensional copper oxides such as Ca₂CuO₃ and Sr₂CuO₃ consistently. It is shown that the Cu 2p XPS is rather insensitive to U_pd, while the optical gap is expanded by stronger U_pd. With U_pd around 2 eV, the superexchange coupling constant of Cu 3d spins is also reasonably reproduced. The influence on the Cu 2p XPS of the intersite Coulomb potential of the Cu 2p hole acting on the neighboring O 2p holes is also discussed.

Original language	English
Pages (from-to)	341-344
Number of pages	4
Journal	journal of the physical society of japan
Volume	66
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.66.341
Publication status	Published - Feb 1997
Externally published	Yes

Keywords

Core level photoemission
Exact diagonalization
One-dimensional Cu oxides
Optical conductivity
Superexchange coupling

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.66.341

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title = "Intersite Coulomb Interactions in Quasi-One-Dimensional Copper Oxides",

abstract = "Intersite Coulomb interaction between Cu 3d and O 2p holes (Upd) is shown to be important in analyzing the optical conductivity and the Cu 2p core-level X-ray photoemission spectrum (XPS) of one-dimensional copper oxides such as Ca2CuO3 and Sr2CuO3 consistently. It is shown that the Cu 2p XPS is rather insensitive to Upd, while the optical gap is expanded by stronger Upd. With Upd around 2 eV, the superexchange coupling constant of Cu 3d spins is also reasonably reproduced. The influence on the Cu 2p XPS of the intersite Coulomb potential of the Cu 2p hole acting on the neighboring O 2p holes is also discussed.",

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author = "Kozo Okada and Akio Kotani",

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AU - Okada, Kozo

AU - Kotani, Akio

PY - 1997/2

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N2 - Intersite Coulomb interaction between Cu 3d and O 2p holes (Upd) is shown to be important in analyzing the optical conductivity and the Cu 2p core-level X-ray photoemission spectrum (XPS) of one-dimensional copper oxides such as Ca2CuO3 and Sr2CuO3 consistently. It is shown that the Cu 2p XPS is rather insensitive to Upd, while the optical gap is expanded by stronger Upd. With Upd around 2 eV, the superexchange coupling constant of Cu 3d spins is also reasonably reproduced. The influence on the Cu 2p XPS of the intersite Coulomb potential of the Cu 2p hole acting on the neighboring O 2p holes is also discussed.

AB - Intersite Coulomb interaction between Cu 3d and O 2p holes (Upd) is shown to be important in analyzing the optical conductivity and the Cu 2p core-level X-ray photoemission spectrum (XPS) of one-dimensional copper oxides such as Ca2CuO3 and Sr2CuO3 consistently. It is shown that the Cu 2p XPS is rather insensitive to Upd, while the optical gap is expanded by stronger Upd. With Upd around 2 eV, the superexchange coupling constant of Cu 3d spins is also reasonably reproduced. The influence on the Cu 2p XPS of the intersite Coulomb potential of the Cu 2p hole acting on the neighboring O 2p holes is also discussed.

KW - Core level photoemission

KW - Exact diagonalization

KW - One-dimensional Cu oxides

KW - Optical conductivity

KW - Superexchange coupling

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Intersite Coulomb Interactions in Quasi-One-Dimensional Copper Oxides

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Keywords

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