Quantum Size Effect in Superconducting Aluminum Films

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 th...

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Veröffentlicht in:	Physics of the solid state 2019-09, Vol.61 (9), p.1559-1562
Hauptverfasser:	Arutyunov, K. Yu, Sedov, E. A., Golokolenov, I. A., Zav’yalov, V. V., Konstantinidis, G., Stavrinidis, A., Stavrinidis, G., Vasiliadis, I., Kekhagias, T., Dimitrakopulos, G. P., Komninu, F., Kroitoru, M. D., Shanenko, A. A.
Format:	Artikel
Sprache:	eng
Schlagworte:	ALUMINIUM Aluminum CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY CONFINEMENT CRITICAL TEMPERATURE DENSITY OF STATES ELECTRON-PHONON COUPLING Film thickness GALLIUM ARSENIDES Metal films Physics Physics and Astronomy Quantum confinement Size effects Solid State Physics Substrates SUPERCONDUCTIVITY Superconductors THIN FILMS
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Beschreibung
Zusammenfassung:	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.
ISSN:	1063-7834 1090-6460
DOI:	10.1134/S1063783419090038