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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).

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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