Anomalous Spin and Charge Dynamics of the 2D t-J Model at low doping

Details Anomalous Spin and Charge Dynamics of the 2D t-J Model at low doping Anomalous Spin and Charge Dynamics of the 2D t-J Model at low doping

1995-01-05

arxiv.org/abs/cond-mat/9501009v1

Physics

Condensed Matter

Revtex-file, 4 PRB pages + 5 figures attached as uu-encoded ps-files Hardcopies of figures (or the entire manuscript) can also

Scientific paper

10.1103/PhysRevLett.74.5124

We present an exact diagonalization study of the dynamical spin and density correlation function of the 2D t-J model for hole doping < 25%. Both correlation functions show a remarkably regular, but completely different scaling behaviour with both hole concentration and parameter values: the density correlation function is consistent with that of bosons corresponding to the doped holes and condensed into the lowest state of the noninteracting band of width 8t, the spin correlation function is consistent with Fermions in a band of width J. We show that the spin bag picture gives a natural explanation for this unusual behaviour.

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