Volume 19, Issue 39 2302065
Research Article

Thickness-Dependent Superconductivity in a Layered Electride on Silicon

Dmitry V. Averyanov

Dmitry V. Averyanov

National Research Center “Kurchatov Institute”, Kurchatov Sq. 1, Moscow, 123182 Russia

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Ivan S. Sokolov

Ivan S. Sokolov

National Research Center “Kurchatov Institute”, Kurchatov Sq. 1, Moscow, 123182 Russia

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Oleg E. Parfenov

Oleg E. Parfenov

National Research Center “Kurchatov Institute”, Kurchatov Sq. 1, Moscow, 123182 Russia

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Alexander N. Taldenkov

Alexander N. Taldenkov

National Research Center “Kurchatov Institute”, Kurchatov Sq. 1, Moscow, 123182 Russia

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Igor A. Karateev

Igor A. Karateev

National Research Center “Kurchatov Institute”, Kurchatov Sq. 1, Moscow, 123182 Russia

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Oleg A. Kondratev

Oleg A. Kondratev

National Research Center “Kurchatov Institute”, Kurchatov Sq. 1, Moscow, 123182 Russia

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Andrey M. Tokmachev

Andrey M. Tokmachev

National Research Center “Kurchatov Institute”, Kurchatov Sq. 1, Moscow, 123182 Russia

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Vyacheslav G. Storchak

Corresponding Author

Vyacheslav G. Storchak

National Research Center “Kurchatov Institute”, Kurchatov Sq. 1, Moscow, 123182 Russia

E-mail: [email protected]

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First published: 31 May 2023
Citations: 2

Abstract

Layered materials exhibit a plethora of fascinating properties. The challenge is to make the materials into epitaxial films, preferably integrated with mature technological platforms to facilitate their potential applications. Progress in this direction can establish the film thickness as a valuable parameter to control various phenomena, superconductivity in particular. Here, a synthetic route to epitaxial films of SrAlSi, a layered superconducting electride, on silicon is designed. A set of films ranging in thickness is synthesized employing a silicene-based template. Their structure and superconductivity are explored by a combination of techniques. Two regimes of TC dependence on the film thickness are identified, the coherence length being the crossover parameter. The results can be extended to syntheses of other honeycomb-lattice ternary compounds on Si or Ge exhibiting superconducting, magnetic, and other properties.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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