Lattice relaxation induced by electronic excitation in Al2O3
- 20 December 1986
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 19 (35) , 6887-6892
- https://doi.org/10.1088/0022-3719/19/35/003
Abstract
Transient volume change induced by irradiation with an electron pulse of alpha -Al2O3 and Cr doped Al2O3 have been measured above 77K. It is found that the volume change induced in alpha -Al2O3 shows a single exponential decay with a lifetime of 12 ms below 140K and that the initial value of the volume change is a linear function of the electron fluence and is not influenced by doping with Cr3+. It is suggested that the transient volume change observed in alpha -Al2O3 is associated with the relaxed excited state resulting from fundamental electronic excitation, possibly the self-trapped exciton.Keywords
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