Symmetry breaking oxygen displacement in superconducting oxides

Conference · Fri Sep 01 00:00:00 EDT 1989

DOI:https://doi.org/10.1016/0921-4534(89)90933-7· OSTI ID:6819476

Egami, T; Toby, B H; Billinge, S; Davies, P K ^[1]; Dmowski, W ^[2]; Jorgensen, J D ^[3]; Subramanian, M A ^[4]; Sleight, A W ^[5]

---

1. Pennsylvania Univ., Philadelphia, PA (USA). Dept. of Materials Science and Engineering
2. Warsaw Univ. (Poland)
3. Argonne National Lab., IL (USA)
4. Du Pont de Nemours (E.I.) and Co., Wilmington, DE (USA)
5. California Univ., Santa Barbara, CA (USA)

Atomic pair distribution analysis of pulsed neutron scattering data for superconducting oxides indicates that some of the atoms, notably oxygen atoms, are displaced from the crystallographic high-symmetry sites, breaking the local symmetry. Anomalous displacements are seen in Tl--Ba--Ca--Cu--O in the vicinity of the superconducting transition temperature, suggesting an unusual nature of the superconducting state of this compound. 4 refs., 2 figs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: NSF
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6819476
• Report Number(s): CONF-890718-37; ON: DE90013670; CNN: DMR-8617950; DMR-8519059
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
NONMETALS
ORDER PARAMETERS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SCATTERING
STRUCTURAL CHEMICAL ANALYSIS
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THALLIUM COMPOUNDS
THALLIUM OXIDES
TRANSITION ELEMENT COMPOUNDS