Dresden 2009 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 6: Postersession Correlated Electrons: (General) Theory, Low-Dimensional Systems, Kondo Physics, Heavy Fermions, Quantum-Critical Phenomena
TT 6.35: Poster
Montag, 23. März 2009, 13:00–16:45, P1A
Huge thermomagnetic and thermoelectric effects in Luttinger liquids and spin chains — •David Rasch1, Arti Garg2, Achim Rosch1, and Efrat Shimshoni3 — 1University of Cologne, Germany — 2Technion, Haifa, Israel — 3Bar-Ilan University, Ramat-Gan, Israel
The interplay of Umklapp scattering and weak disorder in Luttinger liquids and spin chains leads to strong effects in the field and doping dependence of transport quantities. We show that the thermal conductivity of spin chains as a function of a magnetic field B displays a pronounced dip for B ∼ T. In metallic systems, we predict large violations of the Wiedemann Franz law. Depending on the doping, the Wiedemann Franz ratio κ/(σ T) can become either very large or very small.