Atomic-scale imaging of frequency-dependent phonon anisotropy
Schubert, M. et al. Anisotropy, phonon modes, and free charge carrier parameters in monoclinic β-gallium oxide single crystals.…
The expanding world of topological ferroelectrics
In this issue we present three papers on the topological properties or structure of ferroelectrics, which are interlinked.…
Ultrafast dynamics of ferroelectric polarization of NbOI2 captured with femtosecond electron diffraction
Characterization of NbOI2 nanocrystals Figure 1 a shows the crystal lattice of NbOI2. The lattice constants of NbOI2 are…
Ultrafast decoupling of polarization and strain in ferroelectric BaTiO3
Photoinduced structural dynamics Our sample consists of a coherently strained, monodomain BaTiO3 (BTO) thin film, grown on a…
Ferri- and ferro-electric switching in spontaneously chiral polar liquid crystals
Materials Table 1 shows the chemical structures and phases transitions of the materials presented here. Details of chemical synthesis…
Sub-nanosecond polarization switching with anomalous kinetics in vdW ferroelectric WTe2
Characterizations of ferroelectricity in WTe2 WTe2 exhibits various crystal structures, such as 2H, 1T’, and Td. In the…