Theoretical study on the iron-based two-leg ladder tellurides

ORAL

Abstract

The recent discovery of superconductivity in the two-leg ladder compounds BaFe2X3 (X=S, Se) started the novel field of quasi-one-dimensional iron-based superconductors. Here, we predict that the previously barely explored ladder compound RbFe2Te3 should be magnetic with a CX-type arrangement[1]. Moreover, at n = 6.0 our DFT phase diagrams (with/without lattice tetramerization) reveal that the stable magnetic states could be either a 2x2 magnetic Block-type, as for X=Se, or a previously never observed before CY-type state. In the Te-based studies, electrons are more localized than in S, implying that the degree of electronic correlation is enhanced for the Te case. This potential relevance of strong correlation in n=6 Te-123 ladders could also induce exotic phenomena [2], such as Block-type order, the orbital selective Mott physics, and superconductivity under high pressure. Our overarching conclusion is that experimental studies of iron ladder tellurides are worth pursuing.

[1] Y. Zhang, L. F. Lin, A. Moreo, S. Dong and E. Dagotto, arXiv:1908.11765.
[2] Y. Zhang, L. F. Lin, A. Moreo, S. Dong and E. Dagotto (in preparation).

*U.S. Department of Energy, Office of Science, Basic Energy Sciences , Materials Sciences and Engineering Division, National Natural Science Foundation of China.

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Presenters

  • Yang Zhang

    • University of Tennessee
    • Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee

Authors

  • Yang Zhang

    • University of Tennessee
    • Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee

  • Ling-fang Lin

    • University of Tennessee
    • Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee

  • Adriana Moreo

    • University of Tennessee
    • Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee

  • Shuai Dong

    • Southeast University
    • School of Physics, Southeast University

  • Elbio Dagotto

    • Department of Physics and Astronomy, University of Tennessee and ORNL
    • Physics Department, University of Tennessee
    • University of Tennessee
    • Department of Physics and Astronomy, University of Tennessee at Knoxville
    • University of Tennessee, Knoxville, and Oak Ridge National Laboratory
    • University of Tennessee, Knoxville
    • Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee