A search for extra lattice distortions associated with the superconductivity and the charge inhomogeneities in the high-Tc La1.85Sr0.15CuO4 system |
| |
| Affiliation: | 1. College of Physics, Qingdao University, No. 308, Ningxia Road, Qingdao 266071, People''s Republic of China;2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People''s Republic of China;1. Department of Biochemistry, Institute for Biological Research “Siniša Stanković”, University of Belgrade, 142 Despot Stefan Blvd., Belgrade 11000, Serbia;2. Clinic of Endocrinology, Diabetes and Metabolic Diseases, Clinical Center of Serbia and School of Medicine, University of Belgrade, Dr Subotića 13, Belgrade 11000, Serbia;3. Department of Cytology, Institute for Biological Research “Siniša Stanković”, University of Belgrade, 142 Despot Stefan Blvd., Belgrade 11000, Serbia;4. CHC Bežanijska kosa, Bežanijska kosa bb, Belgrade 11000, Serbia |
| |
| Abstract: | Precise measurements of the temperature-dependent lattice parameters in a single crystal of La1.85Sr0.15CuO4 are made by X-ray bond method and analyzed comparing the normal thermal expansion term, proportional to T4. A spontaneous lattice contraction of about 2.3×10−5 Å was found in the ab-plane, while along the c-axis a small expansion of about 1.5×10−5 Å was observed below the superconducting transition temperature of the system, showing some correlation between the structure and the high-Tc superconductivity. A careful search has been made for existence of any extra lattice distortion above the Tc, that might be associated with the stripe inhomogeneities in the title system, however, within the experimental sensitivity we could not find such distortions. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
