Resonant inelastic X-ray scattering study of spin-wave excitations in the cuprate parent compound Ca2CuO2Cl2
- Univ. Pierre et Marie Curie, Paris (France); Synchrotron SOLEIL, Gif-sur-Yvette Cedex (France)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Synchrotron SOLEIL, Gif-sur-Yvette Cedex (France)
- Paul Scherrer Inst. (PSI), Villigen (Switzerland)
- Tokyo Institute of Technology, Yokohama (Japan)
- CEA-Saclay, Gif-sur-Yvette (France); Karlsruhe Institute of Technology, Karlsruhe (Germany)
- Univ. Pierre et Marie Curie, Paris (France)
By means of resonant inelastic x-ray scattering at the Cu L3 edge, we measured the spin wave dispersion along <100> and <110> in the undoped cuprate Ca2CuO2Cl2. The data yields a reliable estimate of the superexchange parameter J = 135 ± 4 meV using a classical spin-1/2 2D Heisenberg model with nearest-neighbor interactions and including quantum fluctuations. Including further exchange interactions increases the estimate to J = 141 meV. The 40 meV dispersion between the magnetic Brillouin zone boundary points (1/2, 0) and (1/4, 1/4) indicates that next-nearest neighbor interactions in this compound are intermediate between the values found in La2CuO4 and Sr2CuO2Cl2. Here by owing to the low-Z elements composing Ca2CuOCl2, the present results may enable a reliable comparison with the predictions of quantum many-body calculations, which would improve our understanding of the role of magnetic excitations and of electronic correlations in cuprates.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC00112704; 1047478
- OSTI ID:
- 1348292
- Alternate ID(s):
- OSTI ID: 1350791
- Report Number(s):
- BNL-113677-2017-JA; R&D Project: PO011; KC0201060; TRN: US1700546
- Journal Information:
- Physical Review B, Vol. 95, Issue 15; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Influence of apical oxygen on the extent of in-plane exchange interaction in cuprate superconductors
|
journal | August 2017 |
Influence of apical oxygen on the extent of in-plane exchange interaction in cuprate superconductors | text | January 2016 |
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