Boundary effect on CDW: Friedel oscillations, STM image

Balázs Dóra

doi:10.1209/epl/i2005-10008-4

Boundary effect on CDW: Friedel oscillations, STM image

Strongly Correlated Electrons 2015-06-25 v1

Authors: Balázs Dóra

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Abstract

We study the effect of open boundary condition on charge density waves (CDW). The electron density oscillates rapidly close to the boundary, and additional non-oscillating terms (~ln(r)) appear. The Friedel oscillations survive beyond the CDW coherence length (v_F/Delta), but their amplitude gets heavily suppressed. The scanning tunneling microscopy image (STM) of CDW shows clear features of the boundary. The local tunneling conductance becomes asymmetric with respect to the Fermi energy, and considerable amount of spectral weight is transferred to the lower gap edge. Also it exhibits additional zeros reflecting the influence of the boundary.

Keywords

charge density wave electric field effects boundary conditions in quantum mechanics

Cite

@article{arxiv.cond-mat/0503435,
  title  = {Boundary effect on CDW: Friedel oscillations, STM image},
  author = {Balázs Dóra},
  journal= {arXiv preprint arXiv:cond-mat/0503435},
  year   = {2015}
}

Comments

7 pages, 6 figures

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