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- W2079900532 abstract "Using an exact diagonalization technique on small clusters, we study spin and density excitations of the triangular-lattice $t$-$J$ model with multiple-spin exchange interactions, whereby we consider anomalous properties observed in the doped Mott region of the two-dimensional liquid $^3$He adsorbed on a graphite surface. We find that the double-peak structure consistent with experiment appears in the calculated temperature dependence of the specific heat; the low-temperature sharp peak comes from the spin excitations reflecting the frustrated nature of the spin degrees of freedom and high-temperature broad peak comes from the density excitations extending over the entire band width. The clear separation in their energy scales is evident in the calculated spin and density excitation spectra. The calculated single-particle excitation spectra suggest the presence of fermionic quasiparticles dressed by the spin excitations, with an enhanced effective mass consistent with experiment." @default.
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- W2079900532 date "2009-01-26" @default.
- W2079900532 modified "2023-10-18" @default.
- W2079900532 title "Spin and density excitations in the triangular-latticet−Jmodel with multiple-spin exchange interactions:H3eon graphite" @default.
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- W2079900532 doi "https://doi.org/10.1103/physrevb.79.024303" @default.
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