Applied Surface Science, volume 589, pages 152951
2D system incorporating perforated Mg sheet sandwiched between Pb layer and Si(111)
Tupchaya Alexandra Y.
1
,
Bondarenko Leonid V.
1
,
Yakovlev A. A.
1
,
Mihalyuk A. N.
1, 2
,
GRUZNEV D
1
,
Denisov N V
1
,
Matetskiy A. V.
1
,
Aladyshkin A.Y
3, 4
,
Zotov A.V.
1
,
Publication type: Journal Article
Publication date: 2022-07-01
Journal:
Applied Surface Science
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 6.7
ISSN: 01694332
Surfaces, Coatings and Films
General Chemistry
General Physics and Astronomy
Condensed Matter Physics
Surfaces and Interfaces
Abstract
We synthesized and characterized a new (6 × 6)-periodical 2D compound layer consisting of a Mg network sandwiched between a Pb atomic layer and Si(111) substrate. Angle-resolved photoelectron spectroscopy revealed the close similarity of its electronic structure with that typical for the Pb/Si(111) system. As a result of Mg intercalation, 0.45 eV band bending takes place due to electron doping from Mg (1.27 electron per atom). The electron–phonon coupling constant λ is enhanced (2.54 ± 0.1) compared to the pristine Pb/Si(111) monolayer (0.58 ± 0.1) as derived from temperature-dependent ARPES measurements of the lifetime broadening. Four-point probe transport measurements revealed the abrupt decrease of surface resistance that disappeared in the presence of a magnetic field. It might be an indication of superconducting phase transition. Although we were unable to observe a zero-resistance state and hence to measure T c directly, we estimated the possible superconducting critical temperature T c = 1.15 K using the Aslamazov–Larkin correction. This value is close to 1.1 K for the case of pristine Pb/Si(111) system. • Mg atoms incorporate between the Pb layer and Si(111) substrate. • Mg atoms avoid T 1 positions leading to “perforation” of the Pb/Mg/Si(111) sandwich. • Electron doping from Mg (1.27 electron per atom) shifts bands 0.45 eV downwards. • Estimated superconducting critical temperature T c is close to that of pristine Pb/Si(111) ( ∼ 1.1 K).
Citations by journals
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Journal of Alloys and Compounds
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Journal of Alloys and Compounds
1 publication, 100%
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1
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Citations by publishers
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1
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Elsevier
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Elsevier
1 publication, 100%
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Tupchaya A. Y. et al. 2D system incorporating perforated Mg sheet sandwiched between Pb layer and Si(111) // Applied Surface Science. 2022. Vol. 589. p. 152951.
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Tupchaya A. Y., Bondarenko L. V., Yakovlev A. A., Vekovshinin Y. E., Mihalyuk A. N., GRUZNEV D., Denisov N. V., Matetskiy A. V., Aladyshkin A., Zotov A., Saranin A. 2D system incorporating perforated Mg sheet sandwiched between Pb layer and Si(111) // Applied Surface Science. 2022. Vol. 589. p. 152951.
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TY - JOUR
DO - 10.1016/j.apsusc.2022.152951
UR - https://doi.org/10.1016%2Fj.apsusc.2022.152951
TI - 2D system incorporating perforated Mg sheet sandwiched between Pb layer and Si(111)
T2 - Applied Surface Science
AU - Tupchaya, Alexandra Y.
AU - Bondarenko, Leonid V.
AU - Yakovlev, A. A.
AU - Vekovshinin, Y. E.
AU - Mihalyuk, A. N.
AU - GRUZNEV, D
AU - Denisov, N V
AU - Matetskiy, A. V.
AU - Aladyshkin, A.Y
AU - Zotov, A.V.
AU - Saranin, A.A.
PY - 2022
DA - 2022/07/01 00:00:00
PB - Elsevier
SP - 152951
VL - 589
SN - 0169-4332
ER -
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@article{2022_Tupchaya,
author = {Alexandra Y. Tupchaya and Leonid V. Bondarenko and A. A. Yakovlev and Y. E. Vekovshinin and A. N. Mihalyuk and D GRUZNEV and N V Denisov and A. V. Matetskiy and A.Y Aladyshkin and A.V. Zotov and A.A. Saranin},
title = {2D system incorporating perforated Mg sheet sandwiched between Pb layer and Si(111)},
journal = {Applied Surface Science},
year = {2022},
volume = {589},
publisher = {Elsevier},
month = {jul},
url = {https://doi.org/10.1016%2Fj.apsusc.2022.152951},
pages = {152951},
doi = {10.1016/j.apsusc.2022.152951}
}