Abstract
Quasi-particle picture is pursued for dynamical charge and spin correlation functions of the one-dimensional supersymmetric t-J model with inverse-square interaction in a magnetic field. With use of exact diagonalization and the asymptotic Bethe-ansatz equations for finite systems, excitation contents of intermediate states are identified in the thermodynamic limit. The dynamical charge structure factor is independent of the spin-polarization density in the region where only quasi-particles with charge (holons and antiholons) are excited. The spin dynamics do not depend on the electron density in the region where only quasi-particles with spin degrees of freedom (spinons and antispinons) contribute. These features indicate the strong spin-charge separation in dynamics, reflecting the high symmetry of the model.
Original language | English |
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Pages (from-to) | 825-826 |
Number of pages | 2 |
Journal | Physica B: Condensed Matter |
Volume | 281-282 |
DOIs | |
Publication status | Published - 2000 Jun |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering