Magnetic excitations and phonons simultaneously studied by resonant inelastic x-ray scattering in optimally doped
- Polytechnic Univ. of Milan (Italy). Dept. of Physics
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
- European Synchrotron Radiation Facility (ESRF), Grenoble (France)
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. for Materials and Energy Sciences (SIMES)
- Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source
- National Inst. of Advanced Industrial Science and Technology (AIST), Ibaraki (Japan). Nanoelectronics Research Inst.
- 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
- 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
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