Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains
D. Cabra, C. Gazza, A. Dobry, and T. Vekua. Abstract Book of the XXIII IUPAP International Conference on Statistical Physics, Genova, Italy, (9-13 July 2007)
Abstract
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=1-2/N (N=3,4,...) plateau decays into N
elementary excitations each carrying a fraction 1/N
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
1/3 plateau (N=3) we unravel the microscopic
structure of the domain walls which carry fractional
spin-1/3, both from theory and numerics. These
excitations are shown to be noninteracting and should
be observable in X-ray and nuclear magnetic resonance
experiments.
%0 Book Section
%1 statphys23_0271
%A Cabra, D.C.
%A Gazza, C.J.
%A Dobry, A.O.
%A Vekua, T.
%B Abstract Book of the XXIII IUPAP International Conference on Statistical Physics
%C Genova, Italy
%D 2007
%E Pietronero, Luciano
%E Loreto, Vittorio
%E Zapperi, Stefano
%K dimensional effects excitations fractional lattice low magnetism magnetization plateaus quantum statphys23 systems topic-8
%T Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains
%U http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=271
%X 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=1-2/N (N=3,4,...) plateau decays into N
elementary excitations each carrying a fraction 1/N
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
1/3 plateau (N=3) we unravel the microscopic
structure of the domain walls which carry fractional
spin-1/3, both from theory and numerics. These
excitations are shown to be noninteracting and should
be observable in X-ray and nuclear magnetic resonance
experiments.
@incollection{statphys23_0271,
abstract = {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=1-2/N (N=3,4,...) plateau decays into N
elementary excitations each carrying a fraction 1/N
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
1/3 plateau (N=3) we unravel the microscopic
structure of the domain walls which carry fractional
spin-1/3, both from theory and numerics. These
excitations are shown to be noninteracting and should
be observable in X-ray and nuclear magnetic resonance
experiments.},
added-at = {2007-06-20T10:16:09.000+0200},
address = {Genova, Italy},
author = {Cabra, D.C. and Gazza, C.J. and Dobry, A.O. and Vekua, T.},
biburl = {https://www.bibsonomy.org/bibtex/263669e3a2eea473a214b6cf9a46f9f3d/statphys23},
booktitle = {Abstract Book of the XXIII IUPAP International Conference on Statistical Physics},
editor = {Pietronero, Luciano and Loreto, Vittorio and Zapperi, Stefano},
interhash = {847091611ec3829d2229e5d46f810ed2},
intrahash = {63669e3a2eea473a214b6cf9a46f9f3d},
keywords = {dimensional effects excitations fractional lattice low magnetism magnetization plateaus quantum statphys23 systems topic-8},
month = {9-13 July},
timestamp = {2007-06-20T10:16:15.000+0200},
title = {Excitations with fractional spin less than 1/2 in frustrated magnetoelastic chains},
url = {http://st23.statphys23.org/webservices/abstract/preview_pop.php?ID_PAPER=271},
year = 2007
}