Publications by authors named "Hugo Kowalczyk"
MoTe has a stable hexagonal semiconducting phase (2H) as well as two semimetallic phases with monoclinic (1T') and orthorhombic (T) structures. A structural change can thus be accompanied by a significant change in electronic transport properties. The two semimetallic phases are connected by a temperature driven transition and could exhibit topological properties.
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- Chalcogenides like GeTe, PbTe, SbTe, and BiSe have unique properties making them suitable for various applications including thermoelectrics, phase change materials, topological insulators, and photonic switches.
- Their special characteristics stem from a unique bonding mechanism where electron delocalization competes with electron localization, resulting in features such as high optical absorption, low thermal conductivity, and good electron mobility.
- Changes in film thickness significantly affect the optical and vibrational properties of crystalline GeTe films, as reductions in thickness lead to increased electron localization and structural distortions, while similar effects are not observed in amorphous films.