Dynamics Of A Quantum Spin Liquid (springer Theses)
by Johannes Knolle /
2016 / English / PDF
6.5 MB Download
This thesis presents an exact theoretical study of dynamical
correlation functions in different phases of a two-dimensional
quantum spin liquid. By calculating the dynamical spin structure
factor and the Raman scattering cross section, this thesis
shows that there are salient signatures―qualitative and
quantitative―of the Majorana fermions and the gauge fluxes emerging
as effective degrees of freedom in the exactly solvable Kitaev
honeycomb lattice model. The model is a representative of a class
of spin liquids with Majorana fermions coupled to Z2 gauge fields.
The qualitative features of the response functions should therefore
be characteristic for this broad class of topological states.
This thesis presents an exact theoretical study of dynamical
correlation functions in different phases of a two-dimensional
quantum spin liquid. By calculating the dynamical spin structure
factor and the Raman scattering cross section, this thesis
shows that there are salient signatures―qualitative and
quantitative―of the Majorana fermions and the gauge fluxes emerging
as effective degrees of freedom in the exactly solvable Kitaev
honeycomb lattice model. The model is a representative of a class
of spin liquids with Majorana fermions coupled to Z2 gauge fields.
The qualitative features of the response functions should therefore
be characteristic for this broad class of topological states.
