Areas of research and scientific activity in Department of Physics
- Spintronics and graphene, termoelectric and termomagnetic properties of graphene;
- Rheological and dielectric studies of soft matter, rheological properties of nanosuspensions;
- Experimental studies of structure and physical properties of selected biological and synthetic polymers;
- Application of the light diffraction patterns for the examination of mechanical properties of fibers – elasticity and dumping in fibers used in composites;
- Electric properties of nonlinear dielectrics, stochastic resonance in ferroelectrics;
- Interaction of sonic and ultrasonic waves with dispersions;
- Multilayer magnetic semiconducting structures;
- Mathematical methods in quantum mechanics and the theory of magnetism;
- Electronic structure of Strongly correlated materials;
- Biomedical applications;
- Application of nanomaterials in modern detectors of radiation.
Transport properties of electrons in semiconducting and metallic magnetic structures.
We study transport properties of electrons in semiconducting and metallic magnetic structures to find some novel effects in various nanodevices such as magnetic nanowires, one- and two-dimensional magnetic systems. For example, we study the anomalous Hall effect and the quantized anomalous Hall effect in two-dimensional magnetic structures. Our results can be used in modern spintronics, quantum metrology, engineering of new materials, and in the technology of mesoscopic structures
Determination of mechanical properties of constructive fibers using laser systems.
We test mechanical properties of constructive fibers with non-contact methods. The investiga-tion results can be used for designing composites in companies that are engaged in producing air-turbine blades, yacht masts, pressure vessels, planes, bicycles, and many other composite mechanical elements.
In the system of rheometer there are carried out rheological studies of Newtonian and non-Newtonian liquids, mixtures, (hydro)gels, solutions of (bio) polymers, greases, liquid crystals and nano-particle suspensions. Viscosity and elasticity of the materials are measured depending on the strain, deformation, shear rate, frequency of oscillation and temperature. Changes in rheological quantities as a function of time and processes of destruction and reconstruction of the structure of the mate-rial are registered. Electro-rheological research is carried out and the effect of pressure on the rheological quantities can be measured.
The study of molecular dynamics of liquid crystal substances using dielectric relaxation.
We study the molecular dynamics with particular emphasis on the impact of surface interac-tions for various liquid crystals. For this purpose are used porous matrices which are filled with the substance under study. This results in amplification of the dielectric response origi-nating from molecules anchored on the surface of the matrix. These studies allows to better understand the impact of the surface interactions on the formation of a variety of liquid crys-talline phases.
The study of properties of ferroelectric single crystals.
We study the electric properties of TGS ferroelectric single crystals.
Following electric properties of TGS (triglicine sulphate) ferroelectric single crystals are stu-died: dielectric permittivity, spontaneous polarization, pyroelectric coefficient. The mecha-nism of the phase transition in ferroelectric single crystals of TGS group is studied as well. This material is used as active element of pyroelectric sensors. Studies are also conducted on the phenomenon of stochastic resonance in this ferroelectric material. The research material is produce in own laboratory of the single crystals growth.
Study on the speed of elastic waves in gases at high temperatures.
The study presents a short theoretical contribution to molecular acoustics. Basing on statisti-cal thermodynamics relations we discusse a formula for the velocity of acoustic waves propa-gation in gases for high temperature conditions. The acoustic waves velocity depends on the specific heat ratio of constant pressures cp to a specific heat at constant volume cv. In normal temperature κ is constant and is determined by the internal structure of gas molecules. In high temperature vibrations of molecules begin to play an important role and the dependence of the specific heat at constant pressure and specific heat at constant volume on the tempera-ture is appeared. In theses cases the dependence of acoustic wave velocity on the tempera-ture is complicated. This subject contains important aspects of the development of modern aviation and rocketry technology.
The study of magnetic nano-structures and spin systems with applications in quantum computing.
The research focuses on the possibility of increasing the speed of data collection, processing and transmission of large amounts of information through quantum channels. The main purpose of this research is the construction of quantum algorithms based on Schur-Weyl matrix for magnetic nano-rings and spin systems, the construction of the corresponding quantum systems and the creation and testing of new structures of representation of quantum information.
The study of nanomaterials
Nanomaterials will be examined for the emission of secondary electrons. The proposed materials are characterized by an increased efficiency of secondary electrons emission under the influence of ionizing radiation (for egzample: ions, electrons, X-rays, photons). The resulting nano-materials could be used in the construction of the apparatus used for imaging in medicine and technology.
The research of photovoltaic materials
We study the photovoltaic materials, phenomena of thermogeneration and optimization and hybridization systems using renewable energy sources.