Fractional charges and spin-charge separation in one-dimensional Wigner lattices

Details Fractional charges and spin-charge separation in one-dimensional Wigner lattices Fractional charges and spin-charge separation in one-dimensional Wigner lattices

2006-08-02

arxiv.org/abs/cond-mat/0608062v2

Phys. Rev. B 75, 125116 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figures

Scientific paper

10.1103/PhysRevB.75.125116

We study density response N(k,omega) and one-particle spectra A(k,omega) for a Wigner lattice model at quarter filling using exact diagonalization. We investigate these observables for models with short and long-range electron-electron interaction and show that truncation of the electron repulsion can lead to very different results. The spectra show clear signatures of charge fractionalization into pairs of domain walls, whose interaction can be attractive or repulsive and is controlled by the formal fractional charges. In striking contrast to a bound exciton in N(k,omega), we find an antibound quasi-particle in A(k,omega), which undergoes spin-charge separation. We present a case of extreme particle-hole asymmetry, where photoemission shows spin-charge separation, while inverse photoemission exhibits an uncorrelated one-particle band.

Affiliated with

Also associated with

No associations

Rating

Fractional charges and spin-charge separation in one-dimensional Wigner lattices does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Fractional charges and spin-charge separation in one-dimensional Wigner lattices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fractional charges and spin-charge separation in one-dimensional Wigner lattices will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-264524