Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-01-31
Phys. Rev. B 71, 205327 (2005)
Physics
Condensed Matter
Strongly Correlated Electrons
version accepted for publication in Phys. Rev. B, 14 pages, 7 figures included
Scientific paper
10.1103/PhysRevB.71.205327
We investigate transport of spinless fermions through a single site dot junction of M one-dimensional quantum wires. The semi-infinite wires are described by a tight-binding model. Each wire consists of two parts: the non-interacting leads and a region of finite extent in which the fermions interact via a nearest-neighbor interaction. The functional renormalization group method is used to determine the flow of the linear conductance as a function of a low-energy cutoff for a wide range of parameters. Several fixed points are identified and their stability is analyzed. We determine the scaling exponents governing the low-energy physics close to the fixed points. Some of our results can already be derived using the non-self-consistent Hartree-Fock approximation.
Barnabe-Theriault X.
Meden Volker
Schoenhammer Kurt
Sedeki Abdel
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