ELECTRON-PHONON INTERACTION AND PHASE-TRANSITIONS IN [C2H5NH3](2)CUCL4 CRYSTALS

Authors
KAPUSTIANIK V KORCHAK Y POLOVINKO I TCHUKVINSKYI R CZAPLA Z DACKO S
Citation
V. Kapustianik et al., ELECTRON-PHONON INTERACTION AND PHASE-TRANSITIONS IN [C2H5NH3](2)CUCL4 CRYSTALS, Physica status solidi. b, Basic research, 207(1), 1998, pp. 95-101
Citations number
9
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica status solidi. b, Basic research → ACNP
ISSN journal
03701972
Volume
207
Issue
1
Year of publication
1998
Pages
95 - 101
Database
ISI
SICI code
0370-1972(1998)207:1<95:EIAPI[>2.0.ZU;2-C
Abstract
Optical and spectral investigations confirmed the availability of phas e transitions in [C2H5NH3](2)CuCl4 at T-1 = 364 K, T-2(h) = 356 K, T-3 = 232 K. It has been found that the empirical Urbach rule is fulfille d in all phases. It is shown, that in the high-temperature phases skel etal vibrations of the C-N-C group interact with phonons, whereas in t he low-temperature phases internal vibrations of the metal-halogen com plex occur. A ferroelastic domain structure was observed using the pol arising microscope in the temperature region 232 to 364 K.