Observation of Dirac-like band dispersion in LaAgSb$_2$

X. Shi; P. Richard; Kefeng Wang; M. Liu; C. E. Matt; N. Xu; R. S. Dhaka; Z. Ristic; T. Qian; Y. -F. Yang; C. Petrovic; M. Shi; H. Ding

doi:10.1103/PhysRevB.93.081105

Observation of Dirac-like band dispersion in LaAgSb$_2$

Materials Science 2016-02-24 v2 Mesoscale and Nanoscale Physics

Authors: X. Shi , P. Richard , Kefeng Wang , M. Liu , C. E. Matt , N. Xu , R. S. Dhaka , Z. Ristic , T. Qian , Y. -F. Yang , C. Petrovic , M. Shi , H. Ding

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Abstract

We present a combined angle-resolved photoemission spectroscopy (ARPES) and first-principles calculations study of the electronic structure of LaAgSb $_2$ in the entire first Brillouin zone. We observe a Dirac-cone-like structure in the vicinity of the Fermi level formed by the crossing of two linear energy bands, as well as the nested segments of Fermi surface pocket emerging from the cone. Our ARPES results show the close relationship of the Dirac cone to the charge-density-wave ordering, providing consistent explanations for exotic behaviors in this material.

Keywords

LaAgSb2 angle-resolved photoemission spectroscopy first-principles calculations Dirac cone Fermi surface nesting charge density wave electronic structure

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@article{arxiv.1512.04187,
  title  = {Observation of Dirac-like band dispersion in LaAgSb$_2$},
  author = {X. Shi and P. Richard and Kefeng Wang and M. Liu and C. E. Matt and N. Xu and R. S. Dhaka and Z. Ristic and T. Qian and Y. -F. Yang and C. Petrovic and M. Shi and H. Ding},
  journal= {arXiv preprint arXiv:1512.04187},
  year   = {2016}
}

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5 pages, 4 figures

Observation of Dirac-like band dispersion in LaAgSb$_2$

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