Lattice and vibrational dynamics of polar materials, like ferroelectrics, relaxors, biological macromolecules, etc. as a function of temperature and under external electric field and pressure.

Critical dynamics related to ferroelectric and other relaxation-like phase transitions in ferroelectrics and relaxors, studying temperature- and frequency-dependent soft modes and relaxations in the vicinity of phase transitions.

Elastic, quasi-elastic, and inelastic neutron and x-ray diffuse scattering coming from time and space correlations in ferroelectrics and relaxor ferroelectrics, e.g. domain walls, nanoscopic domains, and polarization fluctuations.

Lattice-mode-coupling phenomena and local modes in strongly anharmonic crystals.

Anomalous elastic properties of single crystals by investigation of propagation of acoustic modes.

Geometric resonances coming from ferroelectric domain structure in domain-engineered ferroelectrics.

Investigation of phase coexistence, morphotropic phase boundaries, and ferroelectric domain structures by scanning Raman spectroscopy and piezoforce microscopy (PFM).