Hybridization gap and Fano resonance in SmB${_6}$

S. Rößler; Tae-Hwan Jang; D. J. Kim; L. H. Tjeng; Z. Fisk; F. Steglich; S. Wirth

doi:10.1073/pnas.1402643111

Hybridization gap and Fano resonance in SmB${_6}$

Strongly Correlated Electrons 2014-04-04 v1

Authors: S. Rößler , Tae-Hwan Jang , D. J. Kim , L. H. Tjeng , Z. Fisk , F. Steglich , S. Wirth

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Abstract

We present results of Scanning Tunneling Microscopy and Spectroscopy (STS) measurements on the "Kondo insulator" SmB $_6$ . The vast majority of surface areas investigated was reconstructed but, infrequently, also patches of varying size of non-reconstructed, Sm- or B-terminated surfaces were found. On the smallest patches, clear indications for the hybridization gap and inter-multiplet transitions were observed. On non-reconstructed surface areas large enough for coherent co-tunneling we were able to observe clear-cut Fano resonances. Our locally resolved STS indicated considerable finite conductance on all surfaces independent of their structure.

Keywords

SmB6 Kondo insulator scanning tunneling spectroscopy hybridization gap Fano resonance surface reconstruction co-tunneling

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@article{arxiv.1309.6754,
  title  = {Hybridization gap and Fano resonance in SmB${_6}$},
  author = {S. Rößler and Tae-Hwan Jang and D. J. Kim and L. H. Tjeng and Z. Fisk and F. Steglich and S. Wirth},
  journal= {arXiv preprint arXiv:1309.6754},
  year   = {2014}
}

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5 pages, 4 figures

Hybridization gap and Fano resonance in SmB${_6}$

Abstract

Keywords

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