News from the group of theoretical physics
Congratulations to Štěpán Marek, Ph.D. on successful doctoral defence! We wish him much success in his postdoctoral position at the University of Regensburg!
The theoretical department and the department of nanostructures of KFKL participate in the the project Quantum materials for applications in sustainable technologies (QM4ST). The project was awarded from the Programme Johannes Amos Comenius co-financed by the EU, the main researcher is the University of West Bohemia in Pilsen.
The position focuses on solving open questions related to photoexcitations in solids and the induced magnetization dynamics on femtosecond timescale: opto-magnetic effects as well as the analogous phono-magnetic effects facilitated due to strong coupling with phononic modes. The research will be carried in the group of Assoc. Prof. Karel Carva.
Due to their infinite variability, molecular-based transistors offer an exciting alternative to the silicon technology. In collaboration with a lab in India, our theorists have described the workings of a molecular junction that is almost transparent for the electronic current. We congratulate Štěpán Marek, our Ph.D. student, for his first publication!
In contrast to silicon-based transistors, single-molecule junctions can be gated by simple mechanical means: by either stretching or pulling the electrodes. The detailed impact of gating on the conductance has to be evaluated by using quantum theory. Our team has paired with an experimental lab to understand what is going on when you stretch a single molecule.
Scientists from our faculty have made a groundbreaking discovery in the field of optoelectronics. Our research demonstrates a new way to manipulate excitons in semiconductors using coherent optical interactions, opening the door for ultrafast valleytronics operating at multiterahertz frequencies.
An electron and a hole can create bound states known as excitons. When these states occur in an atomically thin semiconducter layer, they behave like two-dimensional hydrogen atoms. Well, not exactly. Find more details in our recent paper.
Materials called transition metal dichalcogenides can hold electrons in band minimas called valleys. We have investigated the possibility to control these electronic states by light pulses. Find the thorough theoretical analysis in our recent paper!
The luminescence spectrum of excitons in ReS2 resembles the transitions in a free atom (Rydberg series), except that some transitions are missing, they are “dark”. This is due to interactions, as detailed by the theoretical calculations of A. Slobodenyuk, and verified by measurements in magnetic fields. Find more details in our recent paper.
We welcome Dr. Athanasios Koliogiorgos and wish him a successful post-doctoctoral stay