Quantum Size Effect in Superconducting Aluminum Films


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Abstract

High-quality aluminum films on GaAs substrates are studied experimentally. The critical temperature of superconductivity is found to increase markedly with decreasing the film thickness. The observed phenomenon is considered as a manifestation of the quantum confinement effect, which affects both the density of states and the electron–phonon interaction.

About the authors

K. Yu. Arutyunov

National Research University Higher School of Economics; Kapitza Institute for Physical Problems, Russian Academy of Sciences

Author for correspondence.
Email: karutyunov@hse.ru
Russian Federation, Moscow; Moscow

E. A. Sedov

National Research University Higher School of Economics

Email: karutyunov@hse.ru
Russian Federation, Moscow

I. A. Golokolenov

National Research University Higher School of Economics; Kapitza Institute for Physical Problems, Russian Academy of Sciences

Email: karutyunov@hse.ru
Russian Federation, Moscow; Moscow

V. V. Zav’yalov

National Research University Higher School of Economics; Kapitza Institute for Physical Problems, Russian Academy of Sciences

Email: karutyunov@hse.ru
Russian Federation, Moscow; Moscow

G. Konstantinidis

Institute of Electronic Structure and Laser, Foundation for Research and Technology (FORTH)

Email: karutyunov@hse.ru
Greece, Heraklion

A. Stavrinidis

Institute of Electronic Structure and Laser, Foundation for Research and Technology (FORTH)

Email: karutyunov@hse.ru
Greece, Heraklion

G. Stavrinidis

Institute of Electronic Structure and Laser, Foundation for Research and Technology (FORTH)

Email: karutyunov@hse.ru
Greece, Heraklion

I. Vasiliadis

Physics Department, Aristotle University of Thessaloniki

Email: karutyunov@hse.ru
Greece, Thessaloniki

T. Kekhagias

Physics Department, Aristotle University of Thessaloniki

Email: karutyunov@hse.ru
Greece, Thessaloniki

G. P. Dimitrakopulos

Physics Department, Aristotle University of Thessaloniki

Email: karutyunov@hse.ru
Greece, Thessaloniki

F. Komninu

Physics Department, Aristotle University of Thessaloniki

Email: karutyunov@hse.ru
Greece, Thessaloniki

M. D. Kroitoru

Institute for Theoretical Physics III, University of Bayreuth; Physics Department, Center for Exact and Natural Sciences, Federal University of Pernambuco

Email: karutyunov@hse.ru
Germany, Bayreuth; Pernambuco

A. A. Shanenko

Physics Department, Center for Exact and Natural Sciences, Federal University of Pernambuco

Email: karutyunov@hse.ru
Brazil, Pernambuco

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