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Quantum vortex fluctuations in cuprate superconductors

Hyok-Jon Kwon
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Abstract

We study the effects of quantum vortex fluctuations in two-dimensional superconductors using a dual theory of vortices, and investigate the relevance to underdoped cuprates where the superconductor-insulator transition (SIT) is possibly driven by quantum vortex proliferation. We find that a broad enough phase fluctuation regime may exist for experimental observation of the quantum vortex fluctuations near SIT in underdoped cuprates. We propose that this scenario can be tested via pair-tunneling experiments which measure the characteristic resonances in the zero-temperature pair-field susceptibility in the vortex-proliferated insulating phase.

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Hyok-Jon Kwon. 2001-01-05. Quantum vortex fluctuations in cuprate superconductors. https://doi.org/10.1103/physrevb.63.134511

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