Isochoric thermal conductivity of solid nitrogen

Details Isochoric thermal conductivity of solid nitrogen Isochoric thermal conductivity of solid nitrogen

2004-12-02

arxiv.org/abs/cond-mat/0412058v1

Low Temp. Phys.(2005)

Physics

Condensed Matter

Disordered Systems and Neural Networks

Postscript 12 pages, 3 figures, 1 table. To be published in 2005

Scientific paper

10.1063/1.1925369

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.

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