JVSS 2023
Oct 31 - Nov 2, 2023Nagoya Congress Center
JVSS 2023
Oct 31 - Nov 2, 2023Nagoya Congress Center
[1Da05]Scanning tunneling microscopy/spectroscopy studies of monolayer FeTe on SrTiO3(001)-√13×√13
*Wen Si1,2, Bin Yu2, Satoru Ichinokura2, Toru Hirahara2(1. The Institute for Solid State Physics, the University of Tokyo, 2. Department of Physics, Tokyo Institute of Technology)
Bulk FeTe has an antiferromagnetic ground state combined with Kondo-lattice behavior. We performed scanning tunneling microscopy/spectroscopy (STM/STS) measurements (5 ~ 77 K) to investigate the properties of the monolayer FeTe grown on SrTiO3-√ 13⨯√ 13. We found C2 symmetric 2⨯ 3 patterns arranged in √ 13⨯√ 13 periodicities in the atomically resolved STM images, breaking the C4 rotational symmetry of the FeTe square lattice. The STS spectra show dip-like features near the Fermi level, which are fitted well with an asymmetric Fano line shape, illustrating a Kondo scenario that local Fe spins interact with the conduction electrons. And the SrTiO3-√ 13⨯√ 13 substrate locally weakens the interaction by structural distortion. Our results clearly show the non-negligible role of the substrate surface in the antiferromagnetic ground state of monolayer FeTe and the detail will be shown in the presentation.
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