Sub-THz Raman response and soft phonon in tetragonal BaTiO3

被引:2
作者
Bejaoui Ouni, Ines [1 ,2 ]
Aroui, Hassen [1 ]
Fontana, Marc D. [2 ,3 ]
机构
[1] Univ Tunis, Lab Spect & Dynam Mol, Ecole Natl Super & Ingn Tunis, Tunis, Tunisia
[2] Univ Lorraine, Lab Mat Photoniqueet Syst LMOPS, Metz, France
[3] Cent Supelec, Lab Mat Opt Photon & Syst LMOPS, Metz, France
关键词
Polarized Raman spectroscopy; structural phase transitions; BaTiO3; soft phonon; low wavenumber; PHASE-TRANSITIONS; MODE SPECTROSCOPY; OPTICAL PHONONS; SCATTERING; CRYSTALS; BEHAVIOR;
D O I
10.1080/01411594.2022.2117044
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
The sub-THz polarized Raman response was measured along the [100] direction in the tetragonal BaTiO3 single crystal. The soft phonon was detected as a resonance peak for the first time by Raman spectroscopy, thanks to the use of notch filters that suppressed elastic scattering. No relaxation peak was observed and we demonstrated that, contrary to the situation along the ferroelectric c-axis, the soft phonon is sufficient to describe the dielectric response of BaTiO3 along the a-axis, except in close vicinity of the tetragonal-cubic phase transition.
引用
收藏
页码:749 / 757
页数:9
相关论文
共 32 条
[1]   LATTICE MODES IN FERROELECTRIC PEROVSKITES .3. SOFT MODES IN BATIO3 [J].
BURNS, G ;
DACOL, FH .
PHYSICAL REVIEW B, 1978, 18 (10) :5750-5755
[2]   CHAIN STRUCTURE OF BATIO3 AND KNBO3 [J].
COMES, R ;
LAMBERT, M ;
GUINIER, A .
SOLID STATE COMMUNICATIONS, 1968, 6 (10) :715-&
[3]   On the terahertz dielectric response of cubic BaTiO3: Coexistence of displacive and order-disorder dynamics [J].
Deng, Hai-Yao .
EPL, 2012, 100 (02)
[4]  
DIDOMENICO M, 1968, PHYS REV, V174, P522, DOI 10.1103/PhysRev.174.522
[5]   FEMTOSECOND TIME-RESOLVED SPECTROSCOPY OF SOFT MODES IN STRUCTURAL PHASE-TRANSITIONS OF PEROVSKITES [J].
DOUGHERTY, TP ;
WIEDERRECHT, GP ;
NELSON, KA ;
GARRETT, MH ;
JENSSEN, HP ;
WARDE, C .
PHYSICAL REVIEW B, 1994, 50 (13) :8996-9019
[6]   Sub-THz Raman response in BaTiO3 and link with structural phase transition [J].
Fontana, Marc D. ;
Kokanyan, Ninel ;
Kauffmann, Thomas H. .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2020, 32 (28)
[7]   Coexistence of the Phonon and Relaxation Soft Modes in the Terahertz Dielectric Response of Tetragonal BaTiO3 [J].
Hlinka, J. ;
Ostapchuk, T. ;
Nuzhnyy, D. ;
Petzelt, J. ;
Kuzel, P. ;
Kadlec, C. ;
Vanek, P. ;
Ponomareva, I. ;
Bellaiche, L. .
PHYSICAL REVIEW LETTERS, 2008, 101 (16)
[8]   Terahertz dielectric response of single-domain BaTiO3 measured by far-infrared spectroscopic ellipsometry [J].
Hoshina, Takuya ;
Kanehara, Kazuki ;
Takeda, Hiroaki ;
Tsurumi, Takaaki .
JAPANESE JOURNAL OF APPLIED PHYSICS, 2014, 53 (09)
[9]  
Jona F., 1962, FERROELECTRIC CRYSTA
[10]   Use of Stokes and anti-Stokes Raman scattering for new applications [J].
Kauffmann, Thomas H. ;
Kokanyan, Ninel ;
Fontana, Marc D. .
JOURNAL OF RAMAN SPECTROSCOPY, 2019, 50 (03) :418-424