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Title: Raman and fluorescence characteristics of resonant inelastic X-ray scattering from doped superconducting cuprates

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep19657· OSTI ID:1237586
 [1];  [2];  [3];  [4];  [2];  [2];  [5];  [5];  [2];  [2];  [6];  [6];  [7];  [7];  [3];  [5];  [3]
  1. National Synchrotron Radiation Research Center, Hsinchu (Taiwan); National Tsing Hua Univ., Hsinchu (Taiwan)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. National Tsing Hua Univ., Hsinchu (Taiwan)
  4. Univ. of Warsaw (Poland)
  5. National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
  6. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States)
  7. National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)

Measurements of spin excitations are essential for an understanding of spin-mediated pairing for superconductivity; and resonant inelastic X-ray scattering (RIXS) provides a considerable opportunity to probe high-energy spin excitations. However, whether RIXS correctly measures the collective spin excitations of doped superconducting cuprates remains under debate. Here we demonstrate distinct Raman- and fluorescence-like RIXS excitations of Bi1.5Pb0.6Sr1.54CaCu2O8+δ. Combining photon-energy and momentum dependent RIXS measurements with theoretical calculations using exact diagonalization provides conclusive evidence that the Raman-like RIXS excitations correspond to collective spin excitations, which are magnons in the undoped Mott insulators and evolve into paramagnons in doped superconducting compounds. In contrast, the fluorescence-like shifts are due primarily to the continuum of particle-hole excitations in the charge channel. Our results show that under the proper experimental conditions RIXS indeed can be used to probe paramagnons in doped high-Tc cuprate superconductors.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1237586
Report Number(s):
SLAC-PUB-16577; srep19657
Journal Information:
Scientific Reports, Vol. 6; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Cited By (11)

Jahn-Teller distortion driven magnetic polarons in magnetite journal June 2017
Doping evolution of the charge excitations and electron correlations in electron-doped superconducting La2−xCexCuO4 journal January 2020
Visualizing dispersive features in 2D image via minimum gradient method journal July 2017
Low-energy orbital excitations in strained LaCoO 3 films journal October 2019
Many-Particle Entanglement Criterion for Superradiantlike States journal July 2017
Highly efficient soft X-ray spectrometer based on a reflection zone plate for resonant inelastic X-ray scattering measurements journal January 2017
X-ray spectroscopy with variable line spacing based on reflection zone plate optics journal January 2018
Highly efficient soft X-ray spectrometer based on a reflection zone plate for resonant inelastic X-ray scattering measurements text January 2017
X-ray spectroscopy with variable line spacing based on reflection zone plate optics text January 2018
Many-particle entanglement criterion for superradiant-like states text January 2016
Doping evolution of the charge excitations and electron correlations in electron-doped superconducting La$_{2-x}$Ce$_{x}$CuO$_{4}$ text January 2019

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