Nonlinear transport by vortex tangles in cuprate high-temperature superconductors

Rong Li; Zhen-Su She

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arXiv · 1706.00228

Nonlinear transport by vortex tangles in cuprate high-temperature superconductors

Rong Li·Zhen-Su She

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Abstract

A unified model of vortex tangles is proposed to describe unconventional transport in cuprate high-temperature superconductors, which not only captures the fast vortices scenario at low density, but also predicts a novel mechanism of core-core collisions in dense vortex fluid regime. The theory clarifies the nature of vortex fluctuations being the quantum fluctuations of holes and then resolves a discrepancy of two orders of magnitude of Anderson's damping model $\hbar n_v$, with right prediction of the nonlinear field dependence of the resistivity $\rho=\rho_n(B+B_T)/(B_0+B+B_T)$ and the Nernst effect, validated by data of several samples. Consequently, Anderson's vortex tangles concept and phase fluctuation scenario of pseudogap are verified quantitatively.

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Rong Li, Zhen-Su She. 2017-06-01. Nonlinear transport by vortex tangles in cuprate high-temperature superconductors. https://arxiv.org/abs/1706.00228

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