Analysis of the local structure by single-crystal neutron scattering in La1.85Sr0.15CuO4 -: art. no. 140510

被引：31

作者：

Braden, M

Meven, M

Reichardt, W

Pintschovius, L

Fernandez-Diaz, MT

Heger, G

Nakamura, F

Fujita, T

机构：

[1] Forschungszentrum Karlsruhe, IFP, D-76021 Karlsruhe, Germany

[2] CEA, CNRS, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France

[3] Rhein Westfal TH Aachen, Inst Kristallog, D-52056 Aachen, Germany

[4] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

[5] Hiroshima Univ, ADSM, Dept Quantum Matter, Higashihiroshima 7398526, Japan

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.63.140510

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

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页数：4

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