Electronic band structure of a Tl/Sn atomic sandwich on Si(111)

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Electronic band structure of a Tl/Sn atomic sandwich on Si(111)	3 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1103/PhysRevB.91.035421

Title: Electronic band structure of a Tl/Sn atomic sandwich on Si(111)
Creator: Gruznev, Dimitry V.
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Matetskiy, Andrey V.
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Tupchaya, Alexandra Y.
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Alekseev, A. A.
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Hsing, Cheng-Rong
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Wei, Ching-Ming
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Eremeev, Sergey V.
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Zotov, Andrey V.
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Saranin, Alexander A.
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Bondarenko, Leonid V.
Date: 2015
DOI: 10.1103/PhysRevB.91.035421
Description: A two-dimensional compound made of one monolayer of Tl and one monolayer of Sn on Si(111) has been found to have a sandwichlike structure in which the Sn layer (having the milk-stool arrangement) resides on the bulklike terminated Si(111) surface and the Tl layer (having the honeycomb-chained-trimer arrangement) is located above the Sn layer. The electronic band structure of the compound contains two spin-split surface-state bands, of which one is nonmetallic and the other is metallic. Near the Fermi level the metallic band is split with the momentum splitting Δk∥=0.037 Å−1 and energy splitting ΔEF=167 meV. The steep dispersion of the band when crossing the Fermi level corresponds to an electron velocity of ≈8.5×105 m/s, which is comparable to the value reported for graphene. The 2D Fermi contours have almost circular shape with spin texture typical for hexagonal surfaces.