Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2002-06-14
Phys. Rev. B 66 (2002) 165327
Physics
Condensed Matter
Strongly Correlated Electrons
RevTeX, 13 pages, including 4 eps figures
Scientific paper
10.1103/PhysRevB.66.165327
We study the conductance of three or more semi-infinite wires which meet at a junction. The electrons in the wires are taken to interact weakly with each other through a short-range density-density interaction, and they encounter a general scattering matrix at the junction. We derive the renormalization group equations satisfied by the S-matrix, and we identify its fixed points and their stabilities. The conductance between any pair of wires is then studied as a function of physical parameters such as temperature. We discuss the possibility of observing the effects of junctions in present day experiments, such as the four-terminal conductance of a quantum wire and crossed quantum wires.
Lal Siddhartha
Rao Sumathi
Sen Diptiman
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