M. Datta, L. Romankiw, et al.
Applied Physics Letters
Results of heat-pulse measurements between 4 and 54°K are reported for sapphire and show that the propagation is ballistic below 18°K and diffusive above 40°K. In the intermediate range, the propagation is a superposition of the two. © 1966 The American Physical Society.
M. Datta, L. Romankiw, et al.
Applied Physics Letters
R.J. Von Gutfeld
Applied Physics Letters
R.J. Von Gutfeld, J.R. Lankard
Opto-electronics
R.J. Von Gutfeld, D.R. Vigliotti
Applied Physics Letters