https://doi.org/10.1007/s100510170156
Fractionally charged excitations in the charge density wave state of a quarter-filled t-J chain with quantum phonons
1
Laboratoire de Physique Quantique (UMR CNRS 5626) , Université Paul Sabatier, 31062 Toulouse, France
2
Theoretische Physik, ETH-Hönggerberg, 8093 Zürich, Switzerland
Corresponding author: a maurel@irsamc.ups-tlse.fr
Received:
30
March
2001
Revised:
11
May
2001
Published online: 15 June 2001
Elementary excitations of the 4kF charge density wave
state of a quarter-filled strongly correlated electronic
one-dimensional chain are investigated in the presence of
dispersionless quantum optical phonons using Density Matrix
Renormalization Group techniques. Such excitations are shown to be
topological solitons carrying charge e/2 and spin zero. Relevance
to the 4kF charge density wave instability in
or recently discovered in (TMTTF)2X (
,
AsF6) is discussed.
PACS: 75.10.-b – General theory and models of magnetic ordering / 75.50.Ee – antiferromagnetics / 71.27.+a – Strongly correlated electron systems; heavy fermions / 75.40.Mg – Numerical simulation studies
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
