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Thermal Conductivity analysis of Y-124 Copper oxide Superconductors

Kamal K. Choudhary 1Netram Kaurav 2Dinesh Varshney 3

1. Department of Physics, Shri Vaishnav Institute of Technology and Science (SVITS), Baroli, Sanwer Road, Indore, Indore 453331, India
2. Department of Physics, Institute of Science and Laboratory Education, IPS Academy,, Rajendra Nagar, Indore, India., Indore 452012, India
3. School of Physics, Devi Ahilya University (DAVV), Khandwa Road Campus, Indore 452017, India

Abstract

We investigate the anomalies reported for the thermal conductivity (k ) of the Copper Oxides superconductors by developing a model Hamiltonian that incorporates the scattering of phonons with defects, grain boundaries, charge carriers, and phonons in the lattice. The lattice thermal conductivity dominates in superconductors is an artifact of strong phonon-defects and -impurity scattering mechanism below Tc. Later on, the scattering of electrons with impurities is investigated in order to assess their role towards thermal conduction. The anomalies are well accounted in terms of interaction among the phonons-impurity and the carrier-impurity. It is concluded that the behaviour of the thermal conductivity is determined by competition among the several operating scattering mechanisms for the heat carriers and a balance between electronic and phononic contributions.

 

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Related papers

Presentation: Poster at E-MRS Fall Meeting 2006, First Fall School on Thermal Analysis, by Kamal K. Choudhary
See On-line Journal of E-MRS Fall Meeting 2006

Submitted: 2006-05-28 15:35
Revised:   2009-06-07 00:44