期刊
PHYSICAL REVIEW LETTERS
卷 86, 期 15, 页码 3396-3399出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.3396
关键词
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We present different numerical calculations based on variational quantum Monte Carlo simulations supporting a ferromagnetic ground state for finite and small hole densities in the two-dimensional infinite-U Hubbard model. Moreover, by studying the energies of different total spin sectors, these calculations strongly suggest that the paramagnetic phase is unstable against a phase with a partial polarization for large hole densities delta similar to 0.40 with evidence for a second-order transition to the paramagnetic large doping phase.
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