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TT: Fachverband Tiefe Temperaturen
TT 28: Transport - Poster Session
TT 28.55: Poster
Donnerstag, 29. März 2007, 14:00–17:45, Poster A
Temperature induced phase averaging in one-dimensional mesoscopic systems — •Severin Jakobs1, Volker Meden2, Herbert Schoeller1, and Tilman Enss3 — 1Institut für Theoretische Physik A, RWTH Aachen, Germany — 2Institut für Theoretische Physik, Universität Göttingen, Germany — 3Dipartimento di Fisica, Università di Roma “La Sapienza”, Italy
We analyse phase averaging in one-dimensional interacting mesoscopic systems with several barriers and show that for incommensurate positions an independent average over several phases can be induced by finite temperature [1]. For three strong barriers with conductances Gi and mutual distances larger than the thermal length, we obtain G∼√G1G2G3 for the total conductance G. For an interacting wire, this implies power laws in G(T) with novel exponents, which we propose as an experimental fingerprint to distinguish temperature induced phase averaging from dephasing.
[1] S. Jakobs, V. Meden, H. Schoeller, T. Enss, cond-mat/0606486