Raman ScatteringFerroelectric Phase TransitionSrtio 3Isotope SubstitutionSoft ModeRaman spectra in SrTiO 3 single crystals were measured. In the ferroelectric phase below T c = 24 K in SrTi 18 O 3, two modes were observed to soften on heating towards T c = 24 K. These modes are assigned ...
Very recently, the lattice dynamics1 and the Raman spectra of SrO have been successfully explained on the basis of a nonlinear shell model. It is shown that a modified version of this model theory can be applied to the case of SrTiO3. The importance of the polarizability of the oxygen ion...
圉3不同La:O3添加量试{荦的Raman光谱 Fig.3Ramanspectraofsamp~swithdiffe~ entLa2Oaaddltions(inmolfraction) 当La2Oa添加量较小时,发生下列反应 0' 0 0' 13 Sinteringtemperoture.c 圉2施主添加量不同时饶结温度对SrTiO陶 瓷半导化的影响 Fig.2InfluenceofsinteringtemperatureOil thesemiconductingofSrTiO3cer...
For MoS2, Raman and PL spectra were acquired on a Horiba LabRAM HR Evolution confocal Raman microscope, using a 532 nm laser set to 34 mW, filtered at 1%. The setup included a 100 × objective with a numerical aperture of 0.9 and gratings with 1800 gr mm−1 for Raman and...
X-ray diffraction patterns, Rietveld refinement data and Raman spectra revealed that the SrTiO 3 cubic structure was completely diffused into the (Bi 0.5 Na 0.5 )TiO 3 lattice with rhombohedral structure. The scanning electron microscopy images showed change in grain morphology from rectangular-like ...
The Raman spectra were examined in the Depth profile of La2NiMnO6 on LaAlO6 (1 0 0) and SrTiO3 (1 0 0) substrate La2NiMnO6 films were grown onto the LaAlO3 (1 0 0) substrate to a thickness of 200 nm. This yields an ordered, oxygen-defect free lattice on top of the LaAlO3 ...
Direct manipulation of the atomic lattice using intense long-wavelength laser pulses has become a viable approach to create new states of matter in complex materials. Conventionally, a high-frequency vibrational mode is driven resonantly by a mid-infrare
Atomic force microscope and Raman spectra were used to characterize the surface morphologies and the bonding structures of the CeO2 films. Epitaxial growth of thick CeO2 films contributes chiefly to a uniform and smooth surface with root mean square roughness of up to 0.272 nm and a high-...
Raman scattering spectra from soft phonon branches in SrTiO3 were observed for the case that the ferroelectric transition was actuated by either applying the (100> uniaxial mechanical stress or adding small amounts of Ba ion. Variations of phonon frequencies of the ferroelectric soft mode were ...
Figure 3g–i show that in the Raman spectra of AlOx/KTO the back-gate voltage induces only a weak and short-lived soft mode peak. The metastable soft mode vanishes within minutes and has similar intensities in s- and p-polarization (see Supplementary Fig. 19). Importantly, the soft mode ...