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TT: Fachverband Tiefe Temperaturen

TT 17: Poster Session: Correlated Electrons 1

TT 17.47: Poster

Montag, 1. April 2019, 15:00–18:30, Poster D

Heat transport through 1D spin chains — •Sonja Fischer and Lars Fritz — Utrecht University, Institute for Theoretical Physics, Princetonplein 5, 3584 CC Utrecht

We investigate the steady-state energy transport through a system of two coupled 1D spin chains at different temperatures. For two identical XX or Ising chains we recover the conjectured expression J_E=cπ/12(T_L²−T_R²) for gapless chains with a conformal charge c [1] and show how this result can be generalized to non-equal chains. In addition we also consider a system with an XX chain coupled to an Ising chain, where the conjecture [1] does not apply and show that the energy transport can be controlled via a magnetic field.
C. Karrasch, R. Ilan and J. E. Moore, PRB 88 195129 (2013)