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

Paata Kakashvili ; Henrik Johannesson ; Sebastian Eggert (Institutionen för teknisk fysik ; Extern)
Phys. Rev. B (1098-0121). Vol. 74 (2006), p. 085114.
[Artikel, refereegranskad vetenskaplig]

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.

Denna post skapades 2007-10-04. Senast ändrad 2007-11-19.
CPL Pubid: 51362


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