A5007332271- Microstructure and mechanical properties
- Metal and Thin Film Mechanics
- Advanced materials and composites
- Advanced Surface Polishing Techniques
- ZnO doping and properties
- Copper-based nanomaterials and applications
- Force Microscopy Techniques and Applications
- Metallurgy and Material Forming
- Laser Material Processing Techniques
- Ga2O3 and related materials
- Metal Forming Simulation Techniques
- Thin-Film Transistor Technologies
- Ferroelectric and Piezoelectric Materials
- Thermography and Photoacoustic Techniques
- Ion-surface interactions and analysis
- Electrophoretic Deposition in Materials Science
- Aluminum Alloys Composites Properties
- Quantum Dots Synthesis And Properties
- Advanced Thermodynamics and Statistical Mechanics
- Granular flow and fluidized beds
- Silicon Nanostructures and Photoluminescence
- Acoustic Wave Resonator Technologies
- Radiative Heat Transfer Studies
- Spectroscopy Techniques in Biomedical and Chemical Research
- Phase-change materials and chalcogenides
University of West Bohemia
2010-2023
Universitat Politècnica de Catalunya
2006-2010
Technical University of Munich
2006-2009
Fraunhofer Society
2006
Nanoindentation experiments in metal surfaces are characterized by the onset of plastic instabilities along with development permanent nanoimprints and dense defect networks. This investigation concerns massive molecular dynamics simulations nanoindentation FCC, BCC HCP metals using blunted (spherical) tips realistic size, detailed comparison results experimental measurements. Our findings shed light on processes which dictate contact resistance to deformation, a transitional stage abrupt...
We examine the phenomenon of flexoelectric switching polarization in ultrathin films barium titanate induced by a tip an atomic force microscope (AFM). The spatial distribution tip-induced flexoelectricity is computationally modeled both for perpendicular mechanical load (point measurements) and sliding (scanning measurements), compared with experiments. find that (i) does not lead to stable ferroelectric contrast applied contact regime, due nontrivial differences between strain...
Three-dimensional (3D) electronic band structure is fundamental for understanding a vast diversity of physical phenomena in solid-state systems, including topological phases, interlayer interactions van der Waals materials, dimensionality-driven phase transitions, etc. Interpretation ARPES data terms 3D electron dispersions commonly based on the free-electron approximation photoemission final states. Our soft-X-ray Ag metal reveals, however, that even at high excitation energies states can...
Abstract Plastic deformation in crystalline materials consists of an ensemble collective dislocation glide processes, which lead to strain burst emissions micro-scale samples. To unravel the combined role structure, sample size and temperature on these we performed a comprehensive set strict displacement-controlled micropillar compression experiments conjunction with large-scale molecular dynamics physics-based discrete simulations. The results indicate that plastic bursts consist numerous...
Abstract The nexus between classic ferroelectricity and the structure of perovskite materials hinges on concept lattice disorder. Although ordered perovskites display short-range displacements central cations around their equilibrium points, disorder dynamically unfolds to generate a myriad distorted rhombohedral lattices characterized by hopping across <111> directions. It is discovered that correlates with emergence minimum configuration energy <100> pathways for cations,...
The Johnson–Mehl–Avrami–Kolmogorov (JMAK) model is widely used to quantify the isothermal crystallization kinetics. present work reports an analytical solution for kinetics in special case of plate-shaped samples with a finite thickness. As result, we obtained adapted JMAK revealing thickness range which influences mode significantly. also provides theoretical bounds film thickness, where assumption 2D or 3D accurate. Finally, conclusions related amorphous silicon and nickel-titanium thin...
Continuum crystal plasticity finite element simulations are performed for archetypal pure and alloyed fcc crystals to investigate the role of crystalline orientation, hardening response dislocation interactions on plastic flow patterns developing underneath spherical pyramidal indenter tips. Following our prior analyses, orientation features such as subsurface lobes surface rosettes goes along that specific in-plane out-of-plane slip systems. Interestingly, however, we currently show...
This article reports a systematic investigation of the synthesis and structural characterization composite CAZO [(Zn<sub>1−x−y</sub>Co<sub>x</sub>Al<sub>y</sub>O; <italic>x</italic> = 0.04, 0.03, 0.02; <italic>y</italic> 0.01, 0.02, 0.03)] nanoparticles from combustion.
Raman spectroscopy is a widely applied analytical technique with numerous applications that based on inelastic scattering of monochromatic light, which typically provided by laser. Irradiation sample laser beam always accompanied an increase in the temperature, may be unwanted or beneficial for studying temperature-related effects and determining thermal parameters. This work reports analyses temperature field induced Gaussian to calculate scattered intensity related each value nonuniform...