Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-04-25
J.Phys.: Condens. Matter 21, 215608 (2009)
Physics
Condensed Matter
Strongly Correlated Electrons
accepted by J. Phys.: Condens. Matter
Scientific paper
We study electronic transport through a one-dimensional, finite-length quantum wire of correlated electrons (Luttinger liquid) coupled at arbitrary position via tunnel barriers to two semi-infinite, one-dimensional as well as stripe-like (two-dimensional) leads, thereby bringing theory closer towards systems closer to setups realized in experiments. In particular, we compute the temperature dependence of the linear conductance $G$ of a system without bulk impurities. The appearance of new temperature scales introduced by the lengths of overhanging parts of the leads and the wire implies a $G(T)$ which is much more complex than the power-law behavior described so far for end-coupled wires. Depending on the precise setup the wide temperature regime of power-law scaling found in the end-coupled case is broken up in up to five fairly narrow regimes interrupted by extended crossover regions. Our results can be used to optimize the experimental setups designed for a verification of Luttinger liquid power-law scaling.
Meden Volker
Schonhammer K.
Wachter Peter
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