Angular momentum anisotropy of Dirac carriers: A new twist in graphene

Link:
Autor/in:
Erscheinungsjahr:
2021
Medientyp:
Text
Schlagworte:
  • Spin-Orbit Coupling
  • Graphene Devices
  • Proximity Effect
  • Graphene
  • Carbon Nanotubes
  • Nanotubes
  • Spin-Orbit Coupling
  • Graphene Devices
  • Proximity Effect
  • Graphene
  • Carbon Nanotubes
  • Nanotubes
Beschreibung:
  • Dirac carriers in graphene are commonly characterized by a pseudospin degree of freedom, arising from the degeneracy of the two inequivalent sublattices. The inherent chirality of the quasiparticles leads to a topologically nontrivial band structure, where the in-plane components of sublattice spin and momentum are intertwined. Equivalently, sublattice imbalance is intimately connected with angular momentum, inducing a torque of opposite sign at each Dirac point. In this work we develop an intuitive picture that associates sublattice spin and winding number with angular momentum. We develop a microscopic perturbative model to obtain the finite angular momentum contributions along the main crystallographic directions. Our results can be employed to determine the angular dependence of the g factor and of light absorption in honeycomb bipartite structures.
Lizenz:
  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH

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Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/f8fa0de3-e86a-41b4-8905-51cf0ec651c0