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Title: Magnetic excitations and phonons simultaneously studied by resonant inelastic x-ray scattering in optimally doped Bi 1.5 Pb 0.55 Sr 1.6 La 0.4 CuO 6 + δ

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [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)

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.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Polytechnic Univ. of Milan (Italy)
Sponsoring Organization:
USDOE; Italian Ministry of Research (MIUR)
Contributing Organization:
Paul Scherrer Inst. (PSI), Villigen (Switzerland); European Synchrotron Radiation Facility (ESRF), Grenoble (France); National Inst. of Advanced Industrial Science and Technology (AIST), Ibaraki (Japan)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1326986
Report Number(s):
SLAC-PUB-16717
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 92, Issue 6; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

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Cited By (2)

Dispersive charge density wave excitations in Bi2Sr2CaCu2O8+δ journal June 2017
Theoretical understanding of photon spectroscopies in correlated materials in and out of equilibrium journal August 2018

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