Awasthi, A. M. and Bhardwaj, S. and Awana, V. P. and Albisetti, A. Figini and Giunchi, G. and Narlikar, A. V. (2013) Carrier transport in magnesium diboride: Role of nano-inclusions. Applied Physics Letters, 103 (11). 112601-112606. ISSN 0003-6951

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Abstract

Anisotropic-gap and two-band effects smear out the superconducting transition (T-c) in literature reported thermal conductivity of MgB2, where large electronic contributions also suppress anomaly-manifestation in their negligible phononic-parts. Present thermal transport results on scarcely explored specimens featuring nano-inclusions exhibit a small but clear T-c-signature, traced to relatively appreciable phononic conduction, and its dominant electronic-scattering. The self-formed MgO as extended defects strongly scatter the charge carriers and minutely the phonons with their longer-mean-free-path near T-c. Conversely, near room temperature, the shorter-dominant-wavelength phonon's transport is hugely affected by these nanoparticles, undergoing ballistic to diffusive crossover and eventually entering the Ioffe-Regel mobility threshold regime.

Item Type:	Article
Additional Information:	copyright for this article belongs to M/s American Institute of Physics
Subjects:	Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	19 Aug 2026 10:40
Last Modified:	19 Aug 2026 10:40
URI:	https://npl.csircentral.net/id/eprint/3323

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