Growth of high-quality Bi2 Sr2 CaCu2 O8+δ whiskers and electrical properties of resulting exfoliated flakes

Jindal, Apoorv ; Jangade, Digambar A. ; Kumar, Nikhil ; Vaidya, Jaykumar ; Das, Ipsita ; Bapat, Rudheer ; Parmar, Jayesh ; Chalke, Bhagyashree A. ; Thamizhavel, Arumugam ; Deshmukh, Mandar M. (2017) Growth of high-quality Bi2 Sr2 CaCu2 O8+δ whiskers and electrical properties of resulting exfoliated flakes Scientific Reports, 7 (1). ISSN 2045-2322

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Official URL: http://doi.org/10.1038/s41598-017-03408-2

Related URL: http://dx.doi.org/10.1038/s41598-017-03408-2

Abstract

In this work, we demonstrate a simple technique to grow high-quality whiskers of Bi2 Sr2 CaCu2 O8+δ – a high T c superconductor. Structural analysis shows the single-crystalline nature of the grown whiskers. To probe electrical properties, we exfoliate these whiskers into thin flakes (~50 nm thick) using the scotch-tape technique and develop a process to realize good electrical contacts. We observe a superconducting critical temperature, Tc , of 86 K. We map the evolution of the critical current as a function of temperature. With 2-D materials emerging as an exciting platform to study low-dimensional physics, our work paves the way for future studies on two-dimensional high-Tc superconductivity.

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