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  Band splitting and relative spin alignment in bilayer systems

Ovchinnikov, A. A., & Ovchinnikova, M. Y. (2002). Band splitting and relative spin alignment in bilayer systems. Journal of Experimental and Theoretical Physics, 94(1), 123-134. Retrieved from http://ojps.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JTPHES000094000001000123000001&idtype=cvips&gifs=Yes.

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Ovchinnikov, A. A.1, Author              
Ovchinnikova, M. Y., Author
Affiliations:
1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              

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 MPIPKS: Superconductivity and magnetism
 Abstract: It is shown that one-particle spectra of the lower Hubbard band of bilayer correlated 2D systems with different relative alignments of the spin systems in the layers differ significantly. In particular, the bilayer band splitting differs from zero for identically directed alternating spins of different layers (F-z configuration), but tends to zero for antiparallel alignment (AF(z) configuration). It is found that the type of the alignment of the ground state changes upon an increase in the doping delta from the lower AF(z) configuration to the F-z configuration of the alignment observed for large values of delta. The behavior of bilayer splitting in Bi2Sr2CaCu2O8 + delta suggests that the configuration of the alignment may change from F-z--> AF(z) simultaneously with the superconducting transition. The effects associated with the influence of spin alignment on the magnetic excitation spectrum as a method of studying the spin structure of bilayer systems are considered for homogeneous solutions of effective spin models. (C) 2002 MAIK "Nauka/Interperiodica".

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Language(s): eng - English
 Dates: 2002
 Publication Status: Published in print
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 Rev. Type: Peer
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Title: Journal of Experimental and Theoretical Physics
  Alternative Title : J. Exp. Theor. Phys.
Source Genre: Journal
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Pages: - Volume / Issue: 94 (1) Sequence Number: - Start / End Page: 123 - 134 Identifier: ISSN: 1063-7761