Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains

Details Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains

2006-08-15

arxiv.org/abs/cond-mat/0608326v2

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 5 figures. Accepted to be published in Phys. Rev. B

Scientific paper

We study the magnetic excitations on top of the plateaux states recently discovered in spin-Peierls systems in a magnetic field. We show by means of extensive density matrix renormalization group (DMRG) computations and an analytic approach that one single spin-flip on top of $M=1-\frac2N$ ($N=3,4,...$) plateau decays into $N$ elementary excitations each carrying a fraction $\frac1N$ of the spin. This fractionalization goes beyond the well-known decay of one magnon into two spinons taking place on top of the M=0 plateau. Concentrating on the $\frac13$ plateau (N=3) we unravel the microscopic structure of the domain walls which carry fractional spin-$\frac13$, both from theory and numerics. These excitations are shown to be noninteracting and should be observable in x-ray and nuclear magnetic resonance experiments.

Affiliated with

Also associated with

No associations

Rating

Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains 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 Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-99414