Double-sided Tl2Ba2Ca2Cu3O10 thin films based high temperature superconducting filter operating above 100 K

Xie, Wei; Wang, Pei; He, Ming; Qiao, Ren; Du, Jia-Nan; Gao, Xiaoxin; Liu, Xin; Xu, Zhenming; Lu, Jianghua; Chen, Haihua; Zhao, Xinjie

doi:10.1063/1.4894735

Cited by 4 publications

(1 citation statement)

References 16 publications

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“…Tl-based superconducting films are known to have high T c values, such as Tl 2 Ba 2 CaCu 2 O 8 [27] (Tl-2212, T c ∼ 108 K) and Tl 2 Ba 2 Ca 2 Cu 3 O 8 [28] (Tl-2223, T c ∼ 124 K). Although the T c values of Tl-2212 and Tl-2223 are remarkable, few studies on Tl-based BJJs have been reported.…”

Section: Introductionmentioning

confidence: 99%

Tl₂Ba₂CaCu₂O₈ bicrystal Josephson junctions operated close to 100 K

Zhao

Tian

Zhang

et al. 2020

Supercond. Sci. Technol.

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We have fabricated Tl 2 Ba 2 CaCu 2 O 8 (Tl-2212) bicrystal Josephson junctions (BJJs) on LaAlO 3 substrates and operated them at bath temperatures close to 100 K. The current-voltage characteristics of BJJs reveal that the critical current I c has a power-law relationship with temperature. In addition, the normal resistance R n has a universal value independent of the bath temperature. The performance of BJJs exhibits a perfect agreement with the Ambegaokar-Halperin model close to 100 K. Under microwave irradiation, Shapiro steps were clearly observed, confirming the genuine Josephson coupling through the grain boundary. We demonstrate that the maximum operating temperature of the proposed junction is up to 100 K, which is fairly close to the T c of the specimen. The results of Tl-2212 bicrystal Josephson junctions may open a new perspective in further studies on low-cost and portable superconducting devices.

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Section: Introductionmentioning

confidence: 99%