Transport in dimerized and frustrated spin systems

F. HEIDRICH-MEISNER, A. HONECKER, D.C. CABRA, W. BRENIG

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

ELSEVIER SCIENCE BV

Año: 2004 vol. 272 p. 890 - 891

0304-8853

We analyze the Drude weight for both spin and thermal transport of one-dimensional spin-1/2 systems by means of exact diagonalization at finite temperatures. While the Drude weights are non-zero for finite systems, we find indications of a vanishing of the Drude weights in the thermodynamic limit for non-integrable models implying normal transport behavior.