Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1999-10-12
J. Phys. A: Math. Gen. 33, 7363 (2000)
Physics
Condensed Matter
Strongly Correlated Electrons
Latex, 11 pages, Version submitted to PRB
Scientific paper
10.1088/0305-4470/33/41/308
We study transport in a class of exactly solvable models of interacting fermions in one dimension. We contrast these models with models of non-interacting fermions in an Aharanov-Bohm ring to which they are superficially similar. We introduce magnetic and non-magnetic impurities at a site, through either a weak $\delta$-function potential or through a weak link. Using a renormalisation group analysis, we show that the strength of the nonmagnetic impurity is not affected by the interaction, whereas the magnetic impurity cuts the wire at the impurity site.
Mohanty Pravata Kumar
Rao Sumathi
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