Hg L3 edge absorption study of the HgBa2CuO4+δ superconductor
Creators
- 1. INFN--Laboratori Nazionali di Frascati, P.O. Box 13, 00044 Frascati (Italy)
- 2. Unita INFM and Dipartimento di Fisica, Universita di Roma 'La Sapienza', P. le Aldo Moro 2, 00185 Rome (Italy)
- 3. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918, Beijing 100039 (China)
Description
The HgBa2CuO4+δ superconductor has been studied by high resolution Hg L3 x-ray absorption near-edge structure (XANES) spectroscopy. The XANES spectrum has been simulated by full multiple-scattering calculations in order to explore the origin of different features in the experimental spectrum. The experimental Hg L3-edge spectrum could be well reproduced by considering a cluster of 85 atoms, containing 10 shells, within a radius of about 7 A from the central Hg atom. The low energy spectral feature in the XANES spectrum is found to be due to a transition from the Hg p states to the electronic states hybridized with higher shell Ba atoms. This implies that the transition features in the Hg L3-edge XANES are strongly influenced by medium range order effects unlike the case of L3 edge of 3d transition metals where short-range order is enough to describe the main transition features
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter and Materials Physics
- Journal Volume
- 64
- Journal Issue
- 9
- Journal Page Range
- p. 092507-092507.4
- ISSN
- 1098-0121
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 35094082
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Descriptors DEI
- ABSORPTION; ABSORPTION SPECTROSCOPY; BARIUM COMPOUNDS; CUPRATES; HIGH-TC SUPERCONDUCTORS; MERCURY COMPOUNDS; MULTIPLE SCATTERING; P STATES; SPECTRA; TRANSITION ELEMENTS; X-RAY SPECTROSCOPY
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; COPPER COMPOUNDS; ELEMENTS; ENERGY LEVELS; METALS; OXYGEN COMPOUNDS; SCATTERING; SORPTION; SPECTROSCOPY; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; TYPE-II SUPERCONDUCTORS
Optional Information
- Notes
- (c) 2001 The American Physical Society