Nonbonding oxygen holes and spinless scenario of magnetic response in doped cuprates / Moskvin AS // JETP LETTERS. - 2004. - V. 80, l. 11. - P. 697-703.

ISSN/EISSN:

0021-3640 / нет данных

Type:

Article

Abstract:

Both theoretical considerations and experimental data point to a more complicated nature of the valence hole states in doped cuprates than is predicted by the Zhang-Rice model. Actually, we deal with a competition of a conventional hybrid Cu 3d-O 2p b(1g) proportional to d(x)(2)-y(2) state and purely oxygen nonbonding state with e(u)x, y proportional to p(x, y) symmetry. The latter reveals a nonquenched Ising-like orbital moment that gives rise to a novel spinless purely oxygen scenario of the magnetic response in doped cuprates with the oxygen localized orbital magnetic moments of the order of tenths of Bohr magneton. We consider the mechanism of Cu-63,Cu- 65-O 2p transferred orbital hyperfine interactions due to the mixing of the oxygen O 2p orbitals with Cu 3p semicore orbitals. Quantitative estimates point to a large magnitude of the respective contributions to both the local field and electric field gradient, and their correlated character. (C) 2004 MAIK ``Nauka/Interperiodica{''}.

Author keywords:

ELECTRIC-FIELD GRADIENTS; SINGLET-TRIPLET MAGNETISM; JAHN-TELLER CENTERS; LATTICE RELAXATION; LOCAL-STRUCTURE; COPPER OXIDES; KNIGHT-SHIFT; SUPERCONDUCTORS; LA2-XSRXCUO4; LA2CUO4

DOI:

10.1134/1.1862797

Web of Science ID:

ISI:000226918500006

Соавторы в МНС:

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Другие поля

Поле	Значение
Publisher	AMER INST PHYSICS
Address	CIRCULATION \& FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
Language	English
Keywords-Plus	ELECTRIC-FIELD GRADIENTS; SINGLET-TRIPLET MAGNETISM; JAHN-TELLER CENTERS; LATTICE RELAXATION; LOCAL-STRUCTURE; COPPER OXIDES; KNIGHT-SHIFT; SUPERCONDUCTORS; LA2-XSRXCUO4; LA2CUO4
Research-Areas	Physics
Web-of-Science-Categories	Physics, Multidisciplinary
Number-of-Cited-References	46
Usage-Count-Since-2013	1
Journal-ISO	Jetp Lett.
Doc-Delivery-Number	896EX