Magnetic states of iron-based two-leg ladder tellurides
Journal Article
·
· Physical Review B
- Southeast Univ., Nanjing (China); Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics and Astronomy
- Southeast Univ., Nanjing (China)
- Southeast Univ., Nanjing (China); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science & Technology Division
The recent discovery of superconductivity at high pressure in the two-leg ladder compounds BaFe2X3(X= S, Se) started the novel field of quasi-one-dimensional iron-based superconductors. In this paper, we use density functional theory (DFT) to predict that the previously barely explored ladder compound RbFe2Te3 should be magnetic with a CX-type arrangement involving ferromagnetic rungs and antiferromagnetic legs, at the realistic density of n=5.5 electrons per iron. The magnetic state similarity with BaFe2S3 suggests that RbFe2Te3 could also become superconducting under pressure. Moreover, at n=6.0 our DFT phase diagrams (with and without lattice tetramerization) reveal that the stable magnetic states could be either a 2×2 magnetic block-type, as for X= Se, or a previously never observed before CY-type state, with ferromagnetic legs and antiferromagnetic rungs. 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.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1606769
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 18 Vol. 100; ISSN 2469-9950; ISSN PRBMDO
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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