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Article Dans Une Revue EPL - Europhysics Letters Année : 2003

Spin and charge dynamics of stripes in doped Mott insulators

Résumé

We study spin and charge dynamics of stripes in doped Mott insulators by considering a two-dimensional Hubbard model with N fermion flavors. For N=2 we recover the normal one-band model while for a spin density wave mean-field solution. For all band fillings, lattice topologies and N=4n, the model may be solved by means of quantum Monte Carlo methods without encountering the sign problem. At N=4 and in the vicinity of the Mott insulator we find a stripe phase. This phase has a quasiparticle gap but conducts due to long-wavelength low-lying collective charge modes.

Dates et versions

hal-00016540 , version 1 (05-01-2006)

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F.F. Assaad, V. G. Rousseau, Frederic Hebert, M. Feldbacher, G. George Batrouni. Spin and charge dynamics of stripes in doped Mott insulators. EPL - Europhysics Letters, 2003, 63 (4), pp.569-575. ⟨10.1209/epl/i2003-00553-2⟩. ⟨hal-00016540⟩
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