Charge-density-wave, non-collinear magnetic structure and magneto-transport properties of the single crystalline EuAg$_4$As$_2$

ORAL

Abstract

Layered materials with exotic ground states have attracted a lot of research interest due to the possible competition or interplay among these orders. In this talk, we will discuss the growth and characterization of a layered silver pnictide material, EuAg$_4$As$_2$. Two-phase transitions, one is around 120 K and the other is around 15 K, are revealed by the resistivity, susceptibility, and heat capacity measurements. Single crystal X-ray diffraction data suggests the high-temperature phase transition is of an incommensurate charge density wave type while the single crystal neutron diffraction measurements show the low-temperature phase transition is from a paramagnetic to a non-collinear antiferromagnetic phase transition. We will also discuss the effect of this non-collinear antiferromagnetism on the magnetotransport in EuAg$_4$As$_2$.

*Acknowledgement: Work at UCLA was supported by DOE award DE-SC0011978. Work at ORNL was supported by DOE.

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Presenters

  • Ni Ni

    • University of California, Los Angeles
    • Department of Physics and Astronomy and California Nano Systems Institute, Univ of California - Los Angeles
    • University of California
    • Physics, University of California, Los Angeles
    • Department of Physics and Astronomy and California NanoSystems Institute, University of California, Los Angeles

Authors

  • Ni Ni

    • University of California, Los Angeles
    • Department of Physics and Astronomy and California Nano Systems Institute, Univ of California - Los Angeles
    • University of California
    • Physics, University of California, Los Angeles
    • Department of Physics and Astronomy and California NanoSystems Institute, University of California, Los Angeles

  • Huibo Cao

    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Oak Ridge National Laboratory
    • Quantum Condensed Matter Division, Oak Ridge National Laboratory
    • Neutron Sciences Directorate, Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Lab
    • Oak Ridge National Lab
    • Oak Ridge Natl Lab
    • Quantum Condensed Matter Division , Oak Ridge National Laboratory

  • Chaowei Hu

    • University of California, Los Angeles
    • Physics and Astronomy, Univ of California - Los Angeles

  • Xin Gui

    • Department of Chemistry, Louisiana State University
    • Louisiana State Univ - Baton Rouge
    • Department of Chemistry, Louisiana state University

  • Weiwei Xie

    • Department of Chemistry, Louisiana State University
    • Louisiana State Univ - Baton Rouge
    • Louisiana State Univ
    • Department of Chemistry, Louisiana state University
    • Chemistry, Lousiana State University
    • Department of Physics and Astronomy, Louisiana State Univ - Baton Rouge

  • Bing Shen

    • University of California, Los Angeles
    • University of California