Synthesis of two-dimensional Tl(x)Bi(1-x) compounds and Archimedean encoding of their atomic structure

Scientific Reports
D V GruznevA A Saranin

Abstract

Crystalline atomic layers on solid surfaces are composed of a single building block, unit cell, that is copied and stacked together to form the entire two-dimensional crystal structure. However, it appears that this is not an unique possibility. We report here on synthesis and characterization of the one-atomic-layer-thick Tl(x)Bi(1-x) compounds which display quite a different arrangement. It represents a quasi-periodic tiling structures that are built by a set of tiling elements as building blocks. Though the layer is lacking strict periodicity, it shows up as an ideally-packed tiling of basic elements without any skips or halting. The two-dimensional Tl(x)Bi(1-x) compounds were formed by depositing Bi onto the Tl-covered Si(111) surface where Bi atoms substitute appropriate amount of Tl atoms. Atomic structure of each tiling element as well as arrangement of Tl(x)Bi(1-x) compounds were established in a detail. Electronic properties and spin texture of the selected compounds having periodic structures were characterized. The shown example demonstrates possibility for the formation of the exotic low-dimensional materials via unusual growth mechanisms.

References

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Apr 23, 2014·Scientific Reports·Dimitry V GruznevAlexander A Saranin

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Citations

Aug 11, 2016·Scientific Reports·Sung-Ping ChenArun Bansil
Nov 16, 2016·Journal of Physics. Condensed Matter : an Institute of Physics Journal·D V GruznevA A Saranin
Dec 20, 2018·Journal of Physics. Condensed Matter : an Institute of Physics Journal·A V MatetskiyA A Saranin
Feb 10, 2018·The Journal of Chemical Physics·Shu-Wei WangChing-Ming Wei
Jun 22, 2018·Nano Letters·Dimitry V GruznevAlexander A Saranin

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Methods Mentioned

BETA
scanning tunneling microscopy

Software Mentioned

Vienna ab initio simulation package ( VASP )
ARPES

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