The isochoric thermal conductivity of solid nitrogen has been investigated on four samples of different densities in the temperature interval from 20 K to the onset of melting. In alfa-N2 the isochoric thermal conductivity exhibits a dependence weaker than 1/T; in beta-N2 it increases slightly with temperature. The experimental results are discussed within a model in which the heat is transported by low-frequency phonons or by "diffusive" modes above the mobility boundary. The growth of the thermal conductivity in beta-N2 is attributed to the decreasing "rotational" component of the total thermal resistance, which occurs as the rotational correlations between the neighboring molecules become weaker.
@article{arxiv.cond-mat/0412058,
title = {Isochoric thermal conductivity of solid nitrogen},
author = {V. A. Konstantinov and V. G. Manzhelii and V. P. Revyakin and V. V. Sagan},
journal= {arXiv preprint arXiv:cond-mat/0412058},
year = {2009}
}
Comments
Postscript 12 pages, 3 figures, 1 table. To be published in 2005