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

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

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 fac...

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Veröffentlicht in:arXiv.org 2019-12
Hauptverfasser: Kaveev, A K, Banshchikov, A G, Terpitskiy, A N, Golyashov, V A, Tereshchenko, O E, Kokh, K A, Estyunin, D A, Shikin, A M, Schwier, E F
Format: Artikel
Sprache:eng
Schlagworte:
Adatoms
Adsorbates
Crystallography
Energy gap
Organic chemistry
Position measurement
Temperature dependence
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Zusammenfassung: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.
ISSN:2331-8422