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Local Spectral Weight of a Luttinger Liquid: Effects from Edges and Impurities

Paata Kakashvili·Henrik Johannesson·Sebastian Eggert
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Abstract

We calculate the finite-temperature local spectral weight (LSW) of a Luttinger liquid with an "open" (hard wall) boundary. Close to the boundary the LSW exhibits characteristic oscillations indicative of spin-charge separation. The line shape of the LSW is also found to have a Fano-like asymmetry, a feature originating from the interplay between electron-electron interaction and scattering off the boundary. Our results can be used to predict how edges and impurities influence scanning tunneling microscopy (STM) of one-dimensional electron systems at low temperatures and voltage bias. Applications to STM on single-walled carbon nanotubes are discussed.

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Paata Kakashvili, Henrik Johannesson, Sebastian Eggert. 2006-07-31. Local Spectral Weight of a Luttinger Liquid: Effects from Edges and Impurities. https://doi.org/10.1103/physrevb.74.085114

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