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  Quantum spin dynamics of the bilayer ferromagnet La1.2Sr1.8Mn2O7

Shannon, N., Chatterji, T., Ouchni, F., & Thalmeier, P. (2002). Quantum spin dynamics of the bilayer ferromagnet La1.2Sr1.8Mn2O7. European Physical Journal B, 27(3), 287-297. Retrieved from http://link.springer.de/link/service/journals/10051/bibs/2027003/20270287.htm.

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 Creators:
Shannon, N.1, Author           
Chatterji, T.1, Author           
Ouchni, F., Author
Thalmeier, P.1, 2, Author           
Affiliations:
1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              
2Peter Thalmeier, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863457              

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 MPIPKS: Superconductivity and magnetism
 Abstract: We construct a theory of spin wave excitations in the bilayer manganite La1.2Sr1.8Mn2O7 based on the simplest possible double-exchange model, but including leading quantum corrections to the spin wave dispersion and damping. Comparison is made with recent inelastic neutron scattering experiments. We find that quantum effects account for some part of the measured damping of spin waves, but cannot by themselves explain the observed softening of spin waves at the zone boundary. Furthermore a doping dependence of the total spin wave dispersion and the optical spin wave gap is predicted.

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Language(s): eng - English
 Dates: 2002-06
 Publication Status: Issued
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
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Title: European Physical Journal B
  Alternative Title : Eur. Phys. J. B
Source Genre: Journal
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Pages: - Volume / Issue: 27 (3) Sequence Number: - Start / End Page: 287 - 297 Identifier: ISSN: 1434-6028