Pseudogap Phase in Cuprates: Oxygen Orbital Moments Instead of Circulating Currents / Moskvin A. S. // JETP LETTERS. - 2012. - V. 96, l. 6. - P. 385-390.

ISSN/EISSN:

0021-3640 / нет данных

Type:

Article

Abstract:

Circulating current loops within the cuprate unit cell are proposed to play a key role in the physics of the pseudogap phase. However, main experimental observations motivated by this sophisticated proposal and seemingly supporting the circulating current model can be explained within a simple and physically clear microscopic model. It has been argued that, instead of a well-isolated Zhang-Rice (ZR) singlet (1)A(1g), the ground state of the hole center {[}CuO4](5-) (cluster analog of Cu3+ ion) in cuprates should be described by a complex (1)A(1g)-B-1,3(2g)-E-1,3(u) multiplet, formed by a competition of conventional hybrid Cu 3d-O 2p b(1g)(sigma) proportional to d(x2-y2) state and purely oxygen nonbonding O 2p pi states with a(2g)(pi) and e(ux, y)(pi) symmetry. In contrast to inactive ZR singlet we arrive at several novel competing orbital and spin-orbital order parameters, e. g., Ising-like net orbital magnetic moment, orbital toroidal moment, intra-plaquette's staggered order of Ising-like oxygen orbital magnetic moments. As a most impressive validation of the non-ZR model we explain fascinating results of recent neutron scattering measurements that revealed novel type of magnetic ordering in pseudogap phase of several hole-doped cuprates. DOI: 10.1134/S0021364012180087

Author keywords:

HIGH-TEMPERATURE SUPERCONDUCTIVITY; TIME-REVERSAL SYMMETRY; T-C SUPERCONDUCTOR; ELECTRONIC-STRUCTURE; COPPER OXIDES; BREAKING; CENTERS; STATE

DOI:

10.1134/S0021364012180087

Web of Science ID:

ISI:000312878700006

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	NOV
Publisher	MAIK NAUKA/INTERPERIODICA/SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013-1578 USA
Language	English
Keywords-Plus	HIGH-TEMPERATURE SUPERCONDUCTIVITY; TIME-REVERSAL SYMMETRY; T-C SUPERCONDUCTOR; ELECTRONIC-STRUCTURE; COPPER OXIDES; BREAKING; CENTERS; STATE
Research-Areas	Physics
Web-of-Science-Categories	Physics, Multidisciplinary
Author-Email	alexandr.moskvin@usu.ru
Funding-Acknowledgement	Russian Foundation for Basic Research {[}10-02-96032, 12-02-01039]
Funding-Text	This work was partially supported by the Russian Foundation for Basic Research, project nos. 10-02-96032 and 12-02-01039.
Number-of-Cited-References	33
Usage-Count-Since-2013	26
Journal-ISO	Jetp Lett.
Doc-Delivery-Number	061VQ