Dynamical properties of the one-dimensional supersymmetric t-J model: A view from elementary excitations

Yasuhiro Saiga, Yoshio Kuramoto

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Dynamical properties, such as dynamical spin and charge structure factors and single-particle spectral functions, are studied for the one-dimensional supersymmetric t-J model with inverse-square interaction. Exact diagonalization and the recursion method are used for finite systems up to 16 sites. A simple rule is proposed to understand the supermultiplet structure in the excitation spectrum. Numerical calculations show that the dynamical spin structure factor is independent of the electron density in the region where only two spinons contribute. In the electron removal spectrum from half-filling, close correspondence is found between the dominant contribution from three-spinon plus one-holon states in the t-J model and the two-spinon excitations in the Haldane-Shastry model. Comparison is made with dynamics of the nearest-neighbor supersymmetric t-J model.

Original languageEnglish
Pages (from-to)3631-3642
Number of pages12
Journaljournal of the physical society of japan
Volume68
Issue number11
DOIs
Publication statusPublished - 1999 Nov

Keywords

  • Dynamical charge structure factor
  • Dynamical spin structure factor
  • Exact diagonalization
  • Inverse-square interaction
  • Nearest-neighbor interaction
  • Recursion method
  • Single-particle spectral function
  • Supersymmetry
  • t-J model

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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