Spin and charge dynamics of stripes in doped Mott insulators

被引：9

作者：

Assaad, FF

Rousseau, V

Hebert, F

Feldbacher, M

Batrouni, GG

机构：

[1] Univ Stuttgart, Inst Theoret Phys 3, D-70550 Stuttgart, Germany

[2] Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany

[3] Univ Nice Sophia Antipolis, Inst Nonlineaire Nice, F-06560 Valbonne, France

[4] Univ Saarland, D-66041 Saarbrucken, Germany

来源：

EUROPHYSICS LETTERS | 2003年 / 63卷 / 04期

关键词：

D O I：

10.1209/epl/i2003-00553-2

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 N --> infinity 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.

引用

页码：569 / 575

页数：7

共 10 条

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