Funct. Mater. 2024; 31 (4): 484-486.
High-temperature electrical superconductivity of layered nanoscale “heterostructures”
1 V.N. Karazin Kharkiv National University, Svobody square, 4, Kharkiv 61022, Ukraine
2 Institute of Scintillation Materials of the SSI “Institute of Single Crystals” of the National Academy of Sciences of Ukraine, 60 Nauky Ave., Kharkiv 61072, Ukraine
The paper discusses the possibility of realizing a superconducting state at temperatures of ≈102 K in layered nano-sized heterostructures – thin-film objects consisting of alternating layers of metals and semimetals (or semiconductors) with a thickness of (1–102) nm. The numerical estimates show that in such structures, an increase in the electron density in semimetals (semiconductors) leads to a change in the electrical conductivity up to the appearance of superconductivity. If we assume that superconductivity is realized as a result of electron-phonon interaction, causing the formation of Cooper electron pairs (Bardeen–Cooper–Schrieffer mechanism), then an increase in the electron density in the semiconductor layer of a nano-sized heterostructure should cause an increase in the pairing constant and so-called high-temperature superconductivity can be realized.
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