Incommensurability of the dynamic spin modulations in La<sub>2-x</sub>Sr<sub>x</sub>CuO<sub>4</sub> (x=0.12)

ORAL

Abstract

The high-temperature superconducting cuprates display intriguing physical phenomena due to the presence of competing or intertwined phases. One of the remarkable observations in both Sr-doped La2-xSrxCuO4 (LSCO) system and O-doped La2CuO4+y is the so-called Y-shift, which refers to a small shift of both spin density wave (SDW) and charge density wave (CDW) peak positions from the high-symmetry Cu-Cu bond direction. However, the ordering temperatures for the SDW and CDW are different. Above the superconducting transition temperature (Tc), there is only incipient spin fluctuation coexisting with the CDW order. In this talk, I will present our recent high-resolution inelastic neutron scattering experiment which characterized the Y-shift in the spin fluctuation regime in LSCO (x=0.12). The implication of the result will be discussed. Our study provides important information on the nature of the spin fluctuation in this system.

*This work was supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division, under contract No. DE-AC02-76SF00515. Research conducted at ORNL's High Flux Isotope Reactor was sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy.

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Presenters

  • Wei He

    • Stanford Univ
    • Department of Materials Science and Engineering, Stanford University
    • Department of Applied Physics, Stanford University

Authors

  • Wei He

    • Stanford Univ
    • Department of Materials Science and Engineering, Stanford University
    • Department of Applied Physics, Stanford University

  • Jiajia Wen

    • Stanford Univ
    • Department of Applied Physics, Stanford University
    • SLAC - Natl Accelerator Lab

  • K. M. Suzuki

    • Institute for Materials Research, Tohoku University
    • Tohoku University

  • Shun Asano

    • Institute for Materials Research, Tohoku University
    • Tohoku University

  • Wei Tian

    • Oak Ridge National Lab
    • Neutron Scattering Division, Oak Ridge National Laboratory

  • Masaki Fujita

    • Institute for Materials Research, Tohoku University
    • IMR, Tohoku University
    • Tohoku University

  • Young Sang Lee

    • Stanford Univ
    • Department of Applied Physics, Stanford University
    • Stanford University