Isotope-shift measurement of the Ngap mode spectrum in KI with persistent ir spectral holes
- 15 November 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 38 (14) , 10170-10173
- https://doi.org/10.1103/physrevb.38.10170
Abstract
Persistent infrared spectral holes are used to identify the isotope shifts of the far-infrared gap modes associated with N in KI. Two of the modes are determined to be translational while the third has a mixed translational-librational character. The properties of the mixed mode disagree in a fundamental way with the predictions of the previous lattice-dynamical calculation for this defect-lattice system.
Keywords
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