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Researchers at Department of Theoretical Physics Have Reported New Data on Physics

February 4, 2014

By a News Reporter-Staff News Editor at Physics Week -- Researchers detail new data in Physics. According to news reporting originating in Kolkata, India, by VerticalNews journalists, research stated, "Motivated by the recent observation of the shell effect in a nanoscale pure superconductor by Bose et al. [Nat. Mater. 9, 550 (2010)], we explore the possible shell-like effect in a strongly disordered superconductor as it is known to produce nanosize superconducting puddles (SPs). We find a remarkable change in the texture of the pairing amplitudes that is responsible for forming the SP, upon monotonic tuning of the average electron density, , and keeping the disorder landscape unaltered."

The news reporters obtained a quote from the research from the Department of Theoretical Physics, "Both the spatially averaged pairing amplitude and the quasiparticle excitation gap oscillate with . This oscillation is due to a rapid change in the low-lying quasiparticle energy spectra and thereby a change in the shapes and positions of the SPs. We establish a correlation between the formation of SPs and the shell-like effect."

According to the news reporters, the research concluded: "The experimental consequences of our theory are also discussed."

For more information on this research see: Amplitude fluctuations driven by the density of electron pairs within nanosize granular structures inside strongly disordered superconductors: evidence for a shell-like effect. Physical Review Letters, 2013;111(20):207004. (American Physical Society -; Physical Review Letters -

Our news correspondents report that additional information may be obtained by contacting S. Ghosh, Dept. of Theoretical Physics, Indian Association for the Cultivation of Science, Kolkata 700 032, India.

Keywords for this news article include: Asia, India, Kolkata, Physics.

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Source: Physics Week

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