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Title: Resonant inelastic X-ray scattering study of spin-wave excitations in the cuprate parent compound Ca2CuO2Cl2

Journal Article · · Physical Review B
 [1];  [2];  [3];  [4];  [4];  [4];  [5];  [5];  [6];  [2];  [7];  [7];  [7]
  1. Univ. Pierre et Marie Curie, Paris (France); Synchrotron SOLEIL, Gif-sur-Yvette Cedex (France)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Synchrotron SOLEIL, Gif-sur-Yvette Cedex (France)
  4. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  5. Tokyo Institute of Technology, Yokohama (Japan)
  6. CEA-Saclay, Gif-sur-Yvette (France); Karlsruhe Institute of Technology, Karlsruhe (Germany)
  7. 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
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

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