期刊
PHYSICA STATUS SOLIDI A-APPLIED RESEARCH
卷 198, 期 2, 页码 487-494出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.200306637
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Temperature studies of optical absorption spectra in the range of the fundamental absorption edge for layered CuInP2Se6 single crystals obtained by the technique combining recrystallization and vapor-phase transport, are reported. The temperature behavior of the absorption-edge spectra is the evidence for the essential changes of the dynamical disordering of CuInP2Se6 crystal structure at second-order (T-0 approximate to 249 K) and first-order (T-c approximate to 236 K) phase transitions. The present anomalous temperature hysteresis and the glass-like behavior of the exponential absorption edge in the intermediate phase resemble those being observed in the incommensurate phases of ferroelectrics.
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