Thermal transport in heavily deformed and γ -irradiated LiF at temperatures near 1 k |
| |
| Authors: | EJ Cotts SE Shore AC Anderson |
| |
| Institution: | Department of Physics and Materials Research Laboratory, University of Illinois, Urbana, IL 61801, U.S.A. |
| |
| Abstract: | The thermal conductivity κ of heavily deformed LiF crystals has been measured at temperatures T ? 0.5 K following exposure of the samples to γ irradiation. The results are in agreement with recent measurements of ballistic phonon propagation in similar samples at an equivalent temperature of ≈ 4 K. A fraction of the phonons have a mean free path of order 1 cm in the heavily deformed crystal, and γ-irradiation increases the fraction having a long mean free path. The measurements support a dynamic (as opposed to static) model of phonon-dislocation interaction. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
