Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Honeycomb Boron on Al(111): from the Concept of Borophene to the Two-Dimensional Boride. / Preobrajenski, A. B.; Lyalin, Andrey; Taketsugu, Tetsuya; Vinogradov, Nikolay A.; Vinogradov, Alexander S.
в: ACS Nano, Том 15, № 9, 30.08.2021, стр. 15153-15165.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Honeycomb Boron on Al(111): from the Concept of Borophene to the Two-Dimensional Boride.
AU - Preobrajenski, A. B.
AU - Lyalin, Andrey
AU - Taketsugu, Tetsuya
AU - Vinogradov, Nikolay A.
AU - Vinogradov, Alexander S.
N1 - Publisher Copyright: © 2021 The Authors. Published by American Chemical Society.
PY - 2021/8/30
Y1 - 2021/8/30
N2 - A great variety of two-dimensional (2D) boron allotropes (borophenes) were extensively studied in the past decade in the quest for graphene-like materials with potential for advanced technological applications. Among them, the 2D honeycomb boron is of specific interest as a structural analogue of graphene. Recently it has been synthesized on the Al(111) substrate; however it remains unknown to what extent does honeycomb boron behave like graphene. Here we elucidate the structural and electronic properties of this unusual 2D material with a combination of core-level X-ray spectroscopies, scanning tunneling microscopy, and DFT calculations. We demonstrate that in contrast to graphene on lattice-mismatched metal surfaces, honeycomb boron cannot wiggle like a blanket on Al(111), but rather induces reconstruction of the top metal layer, forming a stoichiometric AlB2 sheet on top of Al. Our conclusions from theoretical modeling are fully supported by X-ray absorption spectra showing strong similarity in the electronic structure of honeycomb boron on Al(111) and thick AlB2 films. On the other hand, a clear separation of the electronic states of the honeycomb boron into π- and σ-subsystems indicates an essentially 2D nature of the electronic system in both one-layer AlB2 and bulk AlB2.
AB - A great variety of two-dimensional (2D) boron allotropes (borophenes) were extensively studied in the past decade in the quest for graphene-like materials with potential for advanced technological applications. Among them, the 2D honeycomb boron is of specific interest as a structural analogue of graphene. Recently it has been synthesized on the Al(111) substrate; however it remains unknown to what extent does honeycomb boron behave like graphene. Here we elucidate the structural and electronic properties of this unusual 2D material with a combination of core-level X-ray spectroscopies, scanning tunneling microscopy, and DFT calculations. We demonstrate that in contrast to graphene on lattice-mismatched metal surfaces, honeycomb boron cannot wiggle like a blanket on Al(111), but rather induces reconstruction of the top metal layer, forming a stoichiometric AlB2 sheet on top of Al. Our conclusions from theoretical modeling are fully supported by X-ray absorption spectra showing strong similarity in the electronic structure of honeycomb boron on Al(111) and thick AlB2 films. On the other hand, a clear separation of the electronic states of the honeycomb boron into π- and σ-subsystems indicates an essentially 2D nature of the electronic system in both one-layer AlB2 and bulk AlB2.
KW - борофен, 2D материалы, борид алюминия, STM, XPS, NEXAFS, DFT
KW - 2D materials
KW - aluminum boride
KW - borophene
KW - DFT
KW - NEXAFS
KW - STM
KW - XPS
KW - ABSORPTION-SPECTRA
KW - MONOLAYER
KW - BF3
UR - http://www.scopus.com/inward/record.url?scp=85114620021&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/30ba35ae-5281-3621-ae59-61d0b0679a54/
U2 - 10.1021/acsnano.1c05603
DO - 10.1021/acsnano.1c05603
M3 - Article
C2 - 34460239
VL - 15
SP - 15153
EP - 15165
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 9
ER -
ID: 87679722