Neutron scattering study of ferroelectric Sn2P2S6under pressure
作者： P. Ondrejkovic , M. Kempa , Y. Vysochanskii , P. Saint-Grégoire , P. Bourges
DOI: 10.1103/PHYSREVB.86.224106
关键词:
摘要: Ferroelectric phase transition in the semiconductor Sn2P2S6 single crystal has been studied by means of neutron scattering pressure-temperature range adjacent to anticipated tricritical Lifshitz point (p=0.18GPa, T=296K). The observations reveal a direct ferroelectric-paraelectric whole investigated pressure (0.18 - 0.6GPa). These results are clear disagreement with diagrams assumed numerous earlier works, according which hypothetical intermediate incommensurate extends over several or even tens degrees 0.5GPa range. Temperature dependence anisotropic quasielastic diffuse suggests that polarization fluctuations present above TC strongly reduced ordered phase. Still, temperature (200) Bragg reflection intensity at p=0.18GPa can be remarkably well modeled assuming order-parameter amplitude growth power law logarithmic corrections predicted for uniaxial ferroelectric point.
arxiv.org
harvard.edu
sci-hub.se 参考文章(44)
R. Currat, T. Janssen, Excitations in Incommensurate Crystal Phases Journal of Physics C: Solid State Physics. ,vol. 41, pp. 201- 302 ,(1988) , 10.1016/S0081-1947(08)60380-X
Joseph W. Bennett, Kevin F. Garrity, Karin M. Rabe, David Vanderbilt, Hexagonal ABC semiconductors as ferroelectrics Physical Review Letters. ,vol. 109, pp. 167602- ,(2012) , 10.1103/PHYSREVLETT.109.167602
O. Andersson, O. Chobal, I. Rizak, V. Rizak, V. Sabadosh, Effects of pressure and temperature on the thermal conductivity of Sn 2 P 2 S 6 Physical Review B. ,vol. 83, pp. 134121- ,(2011) , 10.1103/PHYSREVB.83.134121
YU. M. Vysochanskii, A. A. Kohutych, A. V. Kityk, A. V. Zadorozhna, M. M. Khoma, A. A. Grabar, Tricritical Behavior of Sn2P2S6 Ferroelectrics at Hydrostatic Pressure Ferroelectrics. ,vol. 399, pp. 83- 88 ,(2010) , 10.1080/00150193.2010.489866
A. G. Slivka, V. M. Kedyulich, E. I. Gerzanich, Pressure Effect on Sn2P2Se6 Type Incommensurate Crystals Ferroelectrics. ,vol. 317, pp. 89- 93 ,(2005) , 10.1080/00150190590963507
M. Imlau, V. Dieckmann, H. Badorreck, A. Shumelyuk, Tin hypothiodiphosphate: nonlinear response in the sub-100 fs time domain Optical Materials Express. ,vol. 1, pp. 953- 961 ,(2011) , 10.1364/OME.1.000953
R. Folk, G. Moser, Lifshitz points in uniaxial ferroelectrics. Physical Review B. ,vol. 47, pp. 13992- 13997 ,(1993) , 10.1103/PHYSREVB.47.13992
B. Scott, M. Pressprich, R.D. Willet, D.A. Cleary, High temperature crystal structure and DSC of Sn2P2S6 Journal of Solid State Chemistry. ,vol. 96, pp. 294- 300 ,(1992) , 10.1016/S0022-4596(05)80262-2
Konstantin Z. Rushchanskii, Yulian M. Vysochanskii, Dieter Strauch, Ferroelectricity, nonlinear dynamics, and relaxation effects in monoclinic Sn2P2S6. Physical Review Letters. ,vol. 99, pp. 207601- ,(2007) , 10.1103/PHYSREVLETT.99.207601
T. K. Barsamian, S. S. Khasanov, V. Sh. Shekhtman, Diffraction analysis of incommensurate phases in crystals of quasi-binary system Sn2P2(S1−xSex)6 Ferroelectrics. ,vol. 138, pp. 63- 77 ,(1993) , 10.1080/00150199308017715