Open AccessTEMPERATURE EFFECTS OF OPTICAL PHONON FOR ZrH1.7 AND PdH0.7
Author(s) -
Ruan Jing-Hui,
Guiying Chen,
Zhang Nan-Ning
Publication year - 1986
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.35.389
Subject(s) - phonon , anharmonicity , physics , atomic physics , beryllium , energy (signal processing) , condensed matter physics , surface phonon , materials science , nuclear physics , quantum mechanics
The optical phonon spectra for ZrH1.7 (containing 0.2% C) and PdH0.7 are measured at room temperature and low temperature (97 K) -with beryllium filter detector spectrometer adjacent to the heavy water pile in the Institute off Atomic Energy. The results show that: (1) Optical phonon Energy Level for ZrH1.7 is equal essentially spacing, the width of energy level essentially does not change with T i.e. the anharmonicity of optical phonon. is weak and it obeys Einstein harmonic model. (2) The second optical phonon energy level spacing for PdH0.7 is about 8 meV larger than that of the first level spacing, and the width of its optical phonon energy level changes from 38 meV at room temperature to 20 meV at 97 K. This means that the optical phonons which ply important role in supercondectivity of PdHx exhibit significant anharmonicity.