Stripe structure and Non-Homogeneity of the CuO2 Plane by Joint EXAFS and Diffraction
نویسندگان
چکیده
Local structure of the Cu02 plane in Bi2Sr2CaCu208+8 (Bi2212) superconductor has been solved by joint Cu K-edge extended X-ray absorption fine structure (EXAFS) and anomalous X-ray diffraction. The Cu-0 pair distribution function (PDF) has been measured by EXAFS and diffraction. The displacement of the Cu ions along the c-axis shows largest amplitude and anharmonic character. The results show flat stripes of the Cu02 lattice of width L = 15 =& 0.5 A that are separated by stripes of bent Cu02 plane. The modulation of the Cu02 plane measured by EXAFS and anomalous diffraction has been discussed.
منابع مشابه
Non-Homogeneity of the CuO2 Plane of the Oxygen Doped La2CuO4.1 System by Polarized EXAFS
Temperature dependent in-plane polarized Cu K-edge extended x-ray ahsorption fine structure (EXAFS) study has been carried out on a high quality single crystal of oxygen doped La2Cu04.1 (LCO) system to investigate the local structure around Cu. The EXAFS data recorded with high degree of plane polarization and up to high momentum transfer (Q=40 A-' = 2k) allowed the quantitative determination o...
متن کاملThe dimpling in the CuO2 planes of YBa2Cu3Ox (x=6.806-6.984, T=20-300 K) measured by yttrium EXAFS
The dimpling of the CuO2 planes (spacing between the O2,3 and Cu2 layers) in YBa2Cu3Ox has been measured as a function of oxygen concentration and temperature by yttrium x-ray extended-fine-structure spectroscopy (EXAFS). The relative variations of the dimpling with doping (x = 6.806 − 6.984) and temperature (20300 K) are weak (within 0.05 Å), and arise mainly from displacements of the Cu2 atom...
متن کاملSpontaneous symmetry breaking by charge stripes in the high pressure phase of superconducting La1.875Ba0.125CuO4.
In those cases where charge-stripe order has been observed in cuprates, the crystal structure is such that the average rotational symmetry of the CuO2 planes is reduced from fourfold to twofold. As a result, one could argue that the reduced lattice symmetry is essential to the existence of stripe order. We use pressure to restore the average fourfold symmetry in a single crystal of La1.875Ba0.1...
متن کاملSynthesis, characterization, stability and structure of solid solutions between ?-miargyrite(AgSbS2) – smithite (AgAsS2) and ?- miargyrite - smithite
Sulphosalts in the system AgSbS2-AgAsS2 have been experimentally investigated using dry methods. The solid solutions which form between ?-miargyrite and smithite have different structures. The EPMA data for the solid solution series show that there is an inverse relation between Sb and As. The cell parameters of the solid solution between ?-miargyrite and smithite increase up to about 50% of...
متن کاملبررسی اثرات ناشی از خستگی در اتصالات سکوی جک‌آپ در دریای‌خزر
One of the important items in offshore structure design is fatigue analysis. Because of existence of periodic loads derived by wave, sea current, wind, etc. this analysis has become one of the major analysis in basic design. Estimation of structure’s life that is generated from fatigue analysis is more important in operation of the offshore unit. In this paper according to the environment...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2016