Publications by authors named "Lucas Maisel Liceran"
Article Synopsis
- Colloidal nanocrystals have advanced in size and surface properties, leading to potential applications in optoelectronics and quantum materials.
- The study focuses on two-dimensional BiSe crystals with controlled thickness, exploring the transition of a topological insulator as it shifts from three to two dimensions.
- Results reveal an 8 nm wide edge state around specific BiSe structures and discuss its characteristics using advanced theoretical models, also suggesting the possible state density for future devices.
We analyze the topology, dispersion, and optical selection rules of bulk Wannier excitons in nanosheets of BiSe, a topological insulator in the family of the bismuth chalcogenides. Our main finding is that excitons also inherit the topology of the electronic bands, quantified by the skyrmion winding numbers of the constituent electron and hole pseudospins as a function of the total exciton momentum. The excitonic bands are found to be strongly indirect due to the band inversion of the underlying single-particle model.
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