On quantum transport in flat-band materials

Oriekhov, D. (2023)

Doctoral Thesis

The studies in this thesis are focused on the physical effects in the flat band materials. The results contain the discovery of strong enhancement of RKKY spin-spin interactions with specific geometric arrangement and dynamical generation of excitonic order parameter with high magnitude. A number of physical properties influenced by flat band are studied: optical conductivity, orbital susceptibility and spectral functions in the case of flat-band lattices stacked into bilayer. Additional chapters contain the studies of the methods to distinguish Majorana zero modes from Andreev levels and Majorana fermions in superconductors.

• Pseudospin-1 fermions
• Van Hove singularities
• Optical conductivity
• Excitonic gap
• Dice lattice
• Majorana zero modes
• Andreev bound states
• Shot noise

• All authors: Oriekhov, D.
• Supervisor: Beenakker, C.W.J.; Adagideli, I.
• Committee: Aarts, J.; Fritz, L.; Greplová, E.; Schalm, K.E.; Zandvliet, H.J.W.
• Qualification: Doctor (dr.)
• Awarding Institution: Leiden Institute of Physics (LION), Faculty of Science, Leiden University
• Date: 2023-10-04
• Title of host publication: Casimir PhD Series
• ISBN (print): 9789085935704
• Name: 2023-22