Berlin 2008 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 24: Correlated Electrons: Low-dimensional Systems - Models
TT 24.5: Vortrag
Mittwoch, 27. Februar 2008, 15:00–15:15, H 2053
Towards Experimental Verification of Luttinger Liquid Behavior — •Peter Wächter1, Volker Meden2, and Kurt Schönhammer1 — 1Institut für Theoretische Physik, Universität Göttingen, Germany — 2Institut für Theoretische Physik, RWTH Aachen, Germany
Luttinger Liquid (LL) behavior of metallic one-dimensional (1d) electron systems is well established as a theoretical concept. It manifests itself e.g. in the power law scaling of a variety of physical observables as functions of external parameters with exponents depending on a single parameter, the LL parameter K. However, experiments revealing clear indications of LL behavior are very rare. One major difficulty is to convincingly exclude any other source than LL physics for the observed scaling. To cope with this problem we propose a scheme to extract K from two different observables as functions of two different external parameters p1 and p2. Consistency of the findings in an experiment, that means K(p1)≈ K(p2), would provide strong evidence for LL physics.