English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Interplay of structural and electronic phase separation in single-crystalline La2CuO4.05 studied by neutron and Raman scattering

MPS-Authors
/persons/resource/persons280221

Lemmens,  P.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons279960

Gehring,  P. M.
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Gnezdilov, V. P., Pashkevich, Y. G., Tranquada, J. M., Lemmens, P., Güntherodt, G., Yeremenko, A. V., et al. (2004). Interplay of structural and electronic phase separation in single-crystalline La2CuO4.05 studied by neutron and Raman scattering. Physical Review B, 69(17): 174508.


Cite as: https://hdl.handle.net/21.11116/0000-000E-FE8E-5
Abstract
We report a neutron- and Raman-scattering study of a single crystal of
La2CuO4.05 prepared by high-temperature electrochemical oxidation.
Elastic neutron-scattering measurements show the presence of two
phases, corresponding to the two edges of the first miscibility gap,
all the way up to 300 K. An additional oxygen redistribution, driven by
electronic energies, is identified at 250 K in Raman scattering (RS)
experiments by the simultaneous onset of two-phonon and two-magnon
scattering, which are fingerprints of the insulating phase. Elastic
neutron-scattering measurements show directly an antiferromagnetic
ordering below a Neel temperature of T-N=210 K. The opening of the
superconducting gap manifests itself as a redistribution of electronic
Raman scattering below the superconducting transition temperature,
T-c=24 K. A pronounced temperature-dependent suppression of the
intensity of the (100) magnetic Bragg peak has been detected below T-c.
We ascribe this phenomenon to a change of relative volume fraction of
superconducting and antiferromagnetic phases with decreasing
temperature caused by a form of a superconducting proximity effect.