Doping dependence of phase coherence between superconducting Bi₂Sr₂CaCu₂O_8+δ grains

2014/08/26 by G. C. Kim, M. Cheon, Kim, G. C. +3
Physics and Astronomy · #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con)

paper · pdf · doi:10.48550/arxiv.1408.6013

openalex publication_date 2014/08/26 · openalex created_date 2024/04/10 · openalex updated_date 2026/07/28

Abstract

In the present work, we report the new findings on the doping level dependence of the phase coherence between superconducting Bi₂Sr₂CaCu₂O_8+δ (Bi-2212) grains. The experimental results from the strongly underdoped and overdoped regimes deviated from the expectation based on the doping level dependence of the superfluid density at T = 0 K. These findings appear to be governed by interplay between competing orders inside the superconducting dome of cuprate superconductors. Two quantum critical points are likely to exist at the underdoped and overdoped regimes beneath the superconducting dome.

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