Electron backscattering from dynamical impurities in a Luttinger liquid

Details Electron backscattering from dynamical impurities in a Luttinger liquid Electron backscattering from dynamical impurities in a Luttinger liquid

2004-09-20

arxiv.org/abs/cond-mat/0409515v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 6 figures. Corrected references, did not compile

Scientific paper

10.1103/PhysRevB.72.165427

Electron backscattering in a Luttinger liquid with an impurity is investigated in the presence of zero point motion of the phonon lattice. The impurity can mean either a mass defect, an elastic defect or a pinning defect. The phonon spectrum is then affected by the presence of the defect, which enters in the renormalization group equations for backscattering. The RG equation becomes dependent on the energy cutoff for finite Debye frequency $\omega_D$ giving rise to finite energy effects. We compute the local density of states and show how the renormalization group flow is affected by a finite $\omega_D$.

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