Exact Charge Dynamics in the Supersymmetric t-J Model with Inverse-Square Interaction

Details Exact Charge Dynamics in the Supersymmetric t-J Model with Inverse-Square Interaction Exact Charge Dynamics in the Supersymmetric t-J Model with Inverse-Square Interaction

1999-07-09

arxiv.org/abs/cond-mat/9907139v3

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages (revtex)

Scientific paper

10.1143/JPSJ.68.3782

Dynamical charge structure factor $N(Q,\omega)$ with $Q$ smaller than the Fermi wave number is derived analytically for the one-dimensional supersymmetric t-J model with $1/r^2$ interaction. Strong spin-charge separation in dynamics is found. $N(Q,\omega)$ with given electron density does not depend on the spin polarization for arbitrary size of the system. In the thermodynamic limit, only two holons and one antiholon contribute to $N(Q,\omega)$. These results together with generalized ones for the SU($K$,1) supersymmetric t-J model are derived via solution of the Sutherland model in the strong coupling limit.

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