Tunneling effects in highly anisotropic layered superconductors

T.B. Charikova^†, N.G. Shelushinina^‡, V.N. Neverov^§, M.R. Popov^*
Mikheev Institute of Metal Physics, Ural Division of the Russian Academy of Sciences, S Kovalevskoi str. 18, Ekaterinburg, 620108, Russian Federation

A brief review of the galvanomagnetic properties of highly anisotropic cuprate superconductors is presented, with an emphasis on the internal Josephson effect, which naturally exists in multilayer HTSC crystals. The transport of charge carriers perpendicular to the layers in such materials occurs by successive tunneling of quasiparticles (or Cooper pairs) between highly conducting (or superconducting) CuO₂ layers through intermediate buffer layers. Currently available results on the nonmetallic conductivity along the c-axis in the normal state are analyzed, as are data on the distinctive branched current-voltage characteristics in the superconducting state, which are clear experimental manifestations of tunneling effects in layered cuprate superconductors.

Keywords: layered superconductors, tunneling effects, current-voltage characteristic, internal Josephson effect
PACS: 74.72.−h
DOI: 10.3367/UFNe.2023.11.039604
URL: https://ufn.ru/en/articles/2024/7/c/
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2024PhyU...67..694C
Citation: Charikova T B, Shelushinina N G, Neverov V N, Popov M R "Tunneling effects in highly anisotropic layered superconductors" Phys. Usp. 67 694–705 (2024)

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Received: 18th, September 2023, revised: 7th, November 2023, accepted: 21st, November 2023

Оригинал: Чарикова Т Б, Шелушинина Н Г, Неверов В Н, Попов М Р «Эффекты туннелирования в сильно анизотропных слоистых сверхпроводниках» УФН 194 740–752 (2024); DOI: 10.3367/UFNr.2023.11.039604

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