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Resonant inelastic X-ray scattering study of spin-wave excitations in the cuprate parent compound Ca$_{2}$CuO$_2$Cl$_2$
- Source :
- Physical Review B: Condensed Matter and Materials Physics (1998-2015), Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2017, 95 (15), pp.155110. ⟨10.1103/PhysRevB.95.155110⟩, Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2017, 95 (15), pp.155110. ⟨10.1103/PhysRevB.95.155110⟩
- Publication Year :
- 2016
-
Abstract
- By means of resonant inelastic x-ray scattering at the Cu L$_3$ edge, we measured the spin wave dispersion along $\langle$100$\rangle$ and $\langle$110$\rangle$ in the undoped cuprate Ca$_2$CuO$_2$Cl$_2$. The data yields a reliable estimate of the superexchange parameter $J$ = 135 $\pm$ 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 La$_{2}$CuO$_4$ and Sr$_2$CuO$_2$Cl$_2$. Owing to the low-$Z$ elements composing Ca$_2$CuO$_2$Cl$_2$, 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.<br />8 pages, 6 figures
- Subjects :
- Superconductivity (cond-mat.supr-con)
[PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]
Superconductivity
PACS numbers: 75.30.Ds, 74.72Gh, 78.70Ck
Condensed Matter - Strongly Correlated Electrons
Strongly Correlated Electrons (cond-mat.str-el)
hole-doped cuprate
inelastic X-ray scattering
Condensed Matter::Superconductivity
Condensed Matter - Superconductivity
FOS: Physical sciences
Condensed Matter::Strongly Correlated Electrons
[PHYS.COND.CM-SCE]Physics [physics]/Condensed Matter [cond-mat]/Strongly Correlated Electrons [cond-mat.str-el]
Subjects
Details
- Language :
- English
- ISSN :
- 10980121 and 1550235X
- Database :
- OpenAIRE
- Journal :
- Physical Review B: Condensed Matter and Materials Physics (1998-2015), Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2017, 95 (15), pp.155110. ⟨10.1103/PhysRevB.95.155110⟩, Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2017, 95 (15), pp.155110. ⟨10.1103/PhysRevB.95.155110⟩
- Accession number :
- edsair.doi.dedup.....76fa0d5d53480e64e6450874fa1e9eea