Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 19: Poster Session: Correlated Electrons 1

TT 19.43: Poster

Montag, 20. März 2017, 15:00–19:00, P2-EG

Thermal transport in the Kitaev spin model — •Angelo Pidatella¹, Alexandros Metavitsiadis², and Wolfram Brenig² — ¹Institute for Theoretical Physics, Technical University of Dresden — ²Institute for Theoretical Physics, Technical University of Braunschweig

We analyze the dynamical thermal conductivity of the Kitaev spin model on the honeycomb lattice, which constitutes an exactly solvable example for a Z₂ spin liquid. Using a mapping to Majorana particles, the thermal transport is described in terms of matter fermions interacting with a Z₂ gauge field. Findings for the transport coefficient within linear response theory will be discussed in the long wave length limit, at finite frequency, and arbitrary temperature. For the zero flux sector, analytic results will be presented, while finite flux densities will be treated numerically within a real space approach, invoking either a summation over all gauge sectors, or using an average gauge field configuration approach. Comparison with findings for the thermal transport in Kitaev spin ladders will also be provided.