Publications by authors named "V Marinova"
Bulk single crystals of WTe were grown by the self-flux method and characterized by X-ray diffraction, polarized micro-Raman spectroscopy, and optical microscopy. All methods revealed a high crystalline quality, thus demonstrating the advantages of the growth method used as a starting base for the synthesis of high-quality 2D materials. In each main scattering configuration, we recorded a series of Raman spectra in different sample orientations achieved by rotating the sample around the incident laser beam.
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- Researchers developed a two-step method to grow high-quality MoS nanoflakes using low-pressure chemical vapor deposition on sapphire substrates.
- The process involved synthesizing a MoS layer and then re-evaporating it at a higher temperature to create mono- or few-layer nanoflakes, confirmed by atomic force microscopy and transmission electron microscopy.
- The study highlighted the unique properties of MoS nanoflakes, including their response to polarized light, suggesting potential uses in advanced photodetectors.
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- The study focuses on the challenges of synthesizing PtSe layers on inexpensive substrates while ensuring high quality and controlled thickness.
- Researchers used a thermally assisted conversion method to grow these layers on soda lime glass, confirming the results through various analytical techniques.
- They demonstrated the potential of PtSe as transparent conductive layers in innovative devices, such as liquid crystal structures, paving the way for cost-effective optoelectronic applications.
Magnetic topological insulators constitute a novel class of materials whose topological surface states (TSSs) coexist with long-range ferromagnetic order, eventually breaking time-reversal symmetry. The subsequent bandgap opening is predicted to co-occur with a distortion of the TSS warped shape from hexagonal to trigonal. We demonstrate such a transition by means of angle-resolved photoemission spectroscopy on the magnetically rare-earth (Er and Dy) surface-doped topological insulator BiSeTe.
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- - The study examines the effects of postdeposition treatments (UV-ozone and thermal annealing) on aluminum-doped zinc oxide (ZnO:Al) thin films grown by atomic layer deposition.
- - X-ray diffraction analysis indicates that the films exhibit a polycrystalline wurtzite structure with an increase in crystal size after thermal annealing, while UV-ozone treatment does not significantly alter crystallinity.
- - Postdeposition treatments influence the electrical and optical properties of ZnO:Al, with UV-ozone exposure increasing oxygen vacancies and effectively reducing sheet resistance without altering the films' basic structure or morphology.