RAMAN-SPECTROSCOPY OF SOFT AND RIGID MODES IN FERROELECTRIC TLINS2

1989-06-01
BURLAKOV, VM
RYABOV, AP
YAKHEEV, MP
VINOGRADOV, EA
MELNIK, NN
Hasanlı, Nızamı
Low‐frequency Raman spectra of a TlInS2 single crystal in the vicinity of a ferroelectric phase transition are reported. In the ferroelectric phase a soft mode interacting with some rigid modes is observed. The temperature dependence of the soft mode frequency is found to be proportional to (Tc – T)1/2. An unusual behaviour of the rigid mode (ω = 20 cm−1) is observed. This fact is interpreted in terms of inherent lattice defects which cause nonhomogeneous broadening.

Citation Formats
V. BURLAKOV, A. RYABOV, M. YAKHEEV, E. VINOGRADOV, N. MELNIK, and N. Hasanlı, “RAMAN-SPECTROSCOPY OF SOFT AND RIGID MODES IN FERROELECTRIC TLINS2,” PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, vol. 153, no. 2, pp. 727–739, 1989, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39907.