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Title: Electronic structure reconstruction across the antiferromagnetic transition in TaFe₁̣₂₃Te₃ spin ladder

With angle-resolved photoemission spectroscopy, we studied the electronic structure of TaFe₁̣₂₃Te₃, a two-leg spin ladder compound with a novel antiferromagnetic ground state. Quasi-two-dimensional Fermi surface is observed, with sizable inter-ladder hopping. Moreover, instead of observing an energy gap at the Fermi surface in the antiferromagnetic state, we observed the shifts of various bands. Combining these observations with density-functional-theory calculations, we propose that the large scale reconstruction of the electronic structure, caused by the interactions between coexisting itinerant electrons and local moments, is most likely the driving force of the magnetic transition. Thus TaFe₁̣₂₃Te₃ serves as a simpler platform that contains similar ingredients as the parent compounds of iron-based superconductors.
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  1. Fudan Univ., Shanghai (China)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Fudan Univ., Shanghai (China); Collaborative Innovation Center of Advaned Microstructures, Nanjing (China)
  4. Univ. of Science and Technology of China, Hefei (China)
  5. Hiroshima Univ., Hiroshima (Japan)
  6. Institute for Molecular Science, Okazaki (Japan)
  7. Paul-Scherrer Institut, Villigen (Switzerland)
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0256-307X; R&D Project: PM002; KC0202030
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Chinese Physics Letters
Additional Journal Information:
Journal Volume: 32; Journal Issue: 2; Journal ID: ISSN 0256-307X
IOP Publishing
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY condensed matter; electrical; magnetic and optical surfaces; interfaces and thin films