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- W2000029861 abstract "We present an exact diagonalization study of the dynamical spin and density correlation functions in small clusters of 2D t-J model for intermediate and low electron densities, rho<0.7. Both correlation functions agree remarkably well with the convolution of the single-particle spectral function, i.e. the simplest estimate within the Fermi liquid picture. Deviations from the convolution are shown to originate from symmetry-related selection rules, which are unaccounted for in the convolution estimate. Comparing the momentum distribution in the final states of the low lying spin and charge excitations to that of the ground state we establish that for all fillings under consideration the low energy peaks in both correlation functions originate from particle-hole excitations, as expected in a Fermi liquid." @default.
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- W2000029861 date "1995-05-01" @default.
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- W2000029861 title "Spin and charge dynamics of the two-dimensionalt-Jmodel at intermediate electron densities: Absence of spin-charge separation" @default.
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- W2000029861 doi "https://doi.org/10.1103/physrevb.51.11683" @default.
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