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Resonant tunneling in high-Tc superconductors


Materials Science Division, Argonne National Laboratory, 9700 South Cass Ave., Argonne, Illinois, 60439, USA

A review is presented of the author’s work on resonance tunneling as an electron transport mechanism along the c axis in high-temperature layered cuprates. A formulation of the problem is given, qualitative aspects of the mechanism are described, and physical properties calculated. Comparisons are made with experimental data for the temperature dependence of normal conductivity, the frequency dependence of optical conductivity, and the stationary supercurrent along the c axis. For the latter, the resonance tunneling coherence of different centers is shown to be of crucial importance. Weakened interplane coupling and vortex fluctuations are invoked to explain the sharp drop in Tc and the rise in the 2Δ(0)/Tc ratio with decreasing oxygen content. Simple example models are given to demonstrate major aspects of resonance tunneling.

Fulltext pdf (230 KB)
Fulltext is also available at DOI: 10.1070/PU1998v041n06ABEH000411
PACS: 74.25.−q, 74.50.+r, 74.72.−h (all)
DOI: 10.1070/PU1998v041n06ABEH000411
URL: https://ufn.ru/en/articles/1998/6/i/
000075347000009
Citation: Abrikosov A A "Resonant tunneling in high-Tc superconductors" Phys. Usp. 41 605–616 (1998)
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Оригинал: Абрикосов А А «Резонансное туннелирование в высокотемпературных сверхпроводниках» УФН 168 683–695 (1998); DOI: 10.3367/UFNr.0168.199806i.0683

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