Band gap opening at the Dirac point in Co/BiSbTeSe2(0001) system

A. K. Kaveev; A. G. Banshchikov; A. N. Terpitskiy; V. A. Golyashov; O. E. Tereshchenko; K. A. Kokh; D. A. Estyunin; A. M. Shikin; E. F. Schwier

Band gap opening at the Dirac point in Co/BiSbTeSe2(0001) system

Materials Science 2019-12-30 v1

Authors: A. K. Kaveev , A. G. Banshchikov , A. N. Terpitskiy , V. A. Golyashov , O. E. Tereshchenko , K. A. Kokh , D. A. Estyunin , A. M. Shikin , E. F. Schwier

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Abstract

Sub-angstrom Co coverage, being deposited on BiSbTeSe2(0001) surface at 200-330 C, opens a band gap at the Dirac point, with the shift of the Dirac point position caused by RT adsorbate pre-deposition. Temperature dependent measurements in 15-150 K range have shown no band gap width change. This fact indicates the nonmagnetic nature of the gap which may be attributed to the chemical hybridization of surface states upon the introduction of Co adatoms, which decrease crystallographic symmetry and eliminate topological protection of the surface states.

Keywords

band gap dirac point bisbtese2 cobalt adsorption topological surface states chemical hybridization nonmagnetic gap

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@article{arxiv.1912.11878,
  title  = {Band gap opening at the Dirac point in Co/BiSbTeSe2(0001) system},
  author = {A. K. Kaveev and A. G. Banshchikov and A. N. Terpitskiy and V. A. Golyashov and O. E. Tereshchenko and K. A. Kokh and D. A. Estyunin and A. M. Shikin and E. F. Schwier},
  journal= {arXiv preprint arXiv:1912.11878},
  year   = {2019}
}

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6 pages, 5 figures

Band gap opening at the Dirac point in Co/BiSbTeSe2(0001) system

Abstract

Keywords

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