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Working groups of department 12

Six research groups and shared research

Research activities of the department of dielectrics are organized within six collaborating groups:

  • Dielectric and IR spectroscopy
  • THz science and technology
  • Light and neutron scattering
  • Theory and simulations
  • Solid-state materials science
  • Liquid crystals

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Dielectric and IR spectroscopy (lead by S. Kamba)

We focus on study of dielectric and vibration spectra of ferroelectrics in the form of single crystals, ceramics, thin films and multilayers in a very broad spectral and temperature range (1 mHz – 150 THz, 5 – 950 K).

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THz science and technology (lead by P. Kužel)

We use an optoelectronic approach to the generation and detection of broadband THz pulses which makes use of ultrashort optical pulses and of their frequency conversion into the THz range. This technique is called the time domain THz spectroscopy and it is able to measure complex dielectric and conductivity spectra of various kinds of samples in a spectral range of 5 to 80 cm-1. In addition, the use of laser pulses for the THz generation makes it possible to perform so called pump

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Light and neutron scattering (lead by I. Gregora)

The group concentrates on investigation of lattice dynamics and critical phenomena in polar materials, like ferroelectrics and relaxor ferroelectrics. These materials are known for their extraordinary dielectric and electromechanical properties, widely used in industrial applications ranging from micro-capacitors and ferroelectric memories to transducers and actuators.

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Theory and simulations (lead by P. Marton)

Thie research group is active in fundamental theoretical investigations of dielectric materials using different calculation and simulation techniques. In particular, we aim at ferroelectrics and relaxors.

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Solid-state materials science (lead by P. Vanek)

We investigate materials with globally or locally broken center of inversion, such as piezoelectric, ferroelectric, antiferroelectric, relaxor or incommensurate dielectrics in form of crystals, ceramics, films as well as complex nanostructures. The team focuses on developing preparation methods, by characterization of structural phase transitions by calorimetric, structural and nonlinear optic methods, and by theoretical modeling of their physical properties.

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Liquid crystals (lead by V. Novotna)

Investigations of novel liquid crystals with dipolar order, understanding of their phase diagram, topological defects and low frequency relaxations responsible for dielectric behaviour.

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