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Title: Magnetic excitations and phonons simultaneously studied by resonant inelastic x-ray scattering in optimally doped Bi1.5Pb0.55Sr1.6La0.4CuO6+δ

In this paper, magnetic excitations in the optimally doped high-Tc superconductor Bi1.5Pb0.55Sr1.6La0.4CuO6+δ (OP-Bi2201, Tc ≃ 34 K) are investigated by Cu L3 edge resonant inelastic x-ray scattering (RIXS), below and above the pseudogap opening temperature. At both temperatures the broad spectral distribution disperses along the (1,0) direction up to ~350 meV at zone boundary, similar to other hole-doped cuprates. However, above ~0.22 reciprocal lattice units, we observe a concurrent intensity decrease for magnetic excitations and quasielastic signals with weak temperature dependence. This anomaly seems to indicate a coupling between magnetic, lattice, and charge modes in this compound. We also compare the magnetic excitation spectra near the antinodal zone boundary in the single layer OP-Bi2201 and in the bilayer optimally doped Bi1.5Pb0.6Sr1.54CaCu2O8+δ (OP-Bi2212, Tc ≃ 96 K). Finally, the strong similarities in the paramagnon dispersion and in their energy at zone boundary indicate that the strength of the superexchange interaction and the short-range magnetic correlation cannot be directly related to Tc, not even within the same family of cuprates.
Authors:
 [1] ;  [2] ;  [3] ;  [1] ;  [3] ;  [1] ;  [4] ;  [1] ;  [5] ;  [6] ;  [5] ;  [6] ;  [4] ;  [7] ;  [8] ;  [8]
  1. Polytechnic Univ. of Milan (Italy). Dept. of Physics
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
  3. European Synchrotron Radiation Facility (ESRF), Grenoble (France)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. for Materials and Energy Sciences (SIMES)
  5. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source
  6. National Inst. of Advanced Industrial Science and Technology (AIST), Ibaraki (Japan). Nanoelectronics Research Inst.
  7. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. for Materials and Energy Sciences (SIMES); Stanford Univ., CA (United States). Dept. of Physics. Dept. of Applied Physics. Geballe Lab. for Advanced Materials
  8. Polytechnic Univ. of Milan (Italy). Dept. of Physics; Polytechnic Univ. of Milan (Italy). National Inter-University Consortium for the Physical Sciences of Matter (CNISM). CNR Inst. SPIN (CNR-SPIN)
Publication Date:
Report Number(s):
SLAC-PUB-16717
Journal ID: ISSN 1098-0121
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 6; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Polytechnic Univ. of Milan (Italy)
Sponsoring Org:
USDOE; Italian Ministry of Research (MIUR)
Contributing Orgs:
Paul Scherrer Inst. (PSI), Villigen (Switzerland); European Synchrotron Radiation Facility (ESRF), Grenoble (France); National Inst. of Advanced Industrial Science and Technology (AIST), Ibaraki (Japan)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1326986