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ID 18782
file
creator
Braden, Markus
Meven, M.
Reichardt, Winfried
Pintschovius, Lothar
Fernandez-Diaz, Maria Teresa
Heger, Gernot
Nakamura, Fumihiko
Fujita, Toshizo
abstract
We have determined the anisotropic Debye-Waller parameters of La1.85Sr0.15CuO4 with high precision using neutron diffraction on single crystals. The mean-square displacements are explained well by the contribution due to phonons and disorder induced by the mixing of La and Sr ions; the latter was simulated by relaxing the structure locally. Our analysis puts rather low upper boundaries on the amplitude of possible hidden local structural distortions; in particular, there is no evidence for in-plane charge inhomogeneities related to stripe correlations. Further, we conclude that the tilt transition in La1.85Sr0.15CuO4 is essentially displacive and continuous in nature.
journal title
Physical Review B - Condensed Matter and Materials Physics
volume
Volume 63
issue
Issue 14
start page
140510-1
end page
140510-4
date of issued
2001-03-23
publisher
American Physical Society
issn
1098-0121
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2001 American Physical Society.
relation url
department
Graduate School of Advanced Sciences of Matter