Resonant tunneling of fluctuation Cooper pairs
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
- Russian Academy of Sciences, Nizhny Novgorod (Russia); Lobachevsky State Univ. of Nizhny Novgorod, Nizhny Novgorod (Russia)
Superconducting fluctuations have proved to be an irreplaceable source of information about microscopic and macroscopic material parameters that could be inferred from the experiment1. According to common wisdom, the effect of thermodynamic fluctuations in the vicinity of the superconducting transition temperature, Tc, is to round off all of the sharp corners and discontinuities, which otherwise would have been expected to occur at Tc. Here we report the current spikes due to radiation-induced resonant tunneling of fluctuation Cooper pairs between two superconductors which grow even sharper and most pronounced upon approach to Tc. This striking effect offers an unprecedented tool for direct measurements of fluctuation Cooper pairs’ lifetime, which is key to our understanding of the fluctuation regime, most notably to nature of the pseudogap state in high temperature superconductors. Our finding marks a radical departure from the conventional view of superconducting fluctuations as blurring and rounding phenomenon.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Russian Ministry of Science and Education
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1194130
- Alternate ID(s):
- OSTI ID: 1357035
- Journal Information:
- Scientific Reports, Vol. 5, Issue 1; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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