Superfluid density dominated junction resistance of bulk polycrystalline YBa2Cu3O7−δ and DyBa2Cu3O7−δ superconductors at low temperature

IF 5.6 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

Superconductivity Pub Date : 2023-12-01 DOI:10.1016/j.supcon.2023.100070

Doyel Rakshit, Sourav Das, Ajay Kumar Ghosh

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引用次数: 0

Abstract

Resistances of grain junctions of bulk polycrystalline YBa₂Cu₃O_7−δ (YBCO) and DyBa₂Cu₃O_7−δ (DyBCO) superconductors have been extracted following (i) Ambegaokar- Baratoff (AB) and (ii) de Gennes (dG) equations. Current–voltage (IV) below the critical temperature ( $T_{c}$ ) has been used to extract transport critical current density ( $J_{c}$ ). The variations of the junction resistances, ( $R_{N}$ ) with temperature (T) exhibit that below a critical value of the normalised superfluid density (NSD), junctions become very low resistive and exhibit metallicity. Dependence of this feature of $R_{N}$ on the energy gaps has also been explored. Weak scattering limit is found to be compatible with the maximum of $R_{N}$ (T) as is observed from the corresponding NSD.

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YBa2Cu3O7−δ和DyBa2Cu3O7−δ超导体的低温结电阻由超流密度决定

根据(i) Ambegaokar- Baratoff (AB)方程和(ii) de Gennes (dG)方程，计算了块体多晶YBa2Cu3O7−δ (YBCO)和DyBa2Cu3O7−δ (DyBCO)超导体晶粒结的电阻。使用低于临界温度(Tc)的电流-电压(IV)来提取输运临界电流密度(Jc)。结电阻(RN)随温度(T)的变化表明，在归一化超流体密度(NSD)的临界值以下，结的电阻变得非常低，并表现出金属丰度。我们还探讨了RN的这一特征对能隙的依赖性。弱散射极限与相应的NSD观测到的RN (T)最大值是相容的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Superconductivity

CiteScore

3.90

自引率

0.00%

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