What can graphene teach us about the bridge between quantum field theory and kinetic theory?
by
Janik Kailasvuori(MPI Dresden)
→
Europe/Stockholm
122:026
122:026
Description
Semiclassical spin-coherent kinetic equations can be derived from
quantum theory with many different formalisms. For 2d Dirac electrons
(e.g. in graphene, 3d topological insulators, ...) we found to our
surprise that well established formalisms give different results. We
have been able to point out the exact source of the discrepancy and
raise fundamental questions about how to derive semiclassical kinetic
equation when some quantum coherence has to retained. Further, in
monolayer graphene we make the unintuitive finding that there
could be finite electron-hole coherent quantum effects even far away
from the point where electron and hole bands touch.