共 7 条
[4]
RENORMALIZATION, VORTICES, AND SYMMETRY-BREAKING PERTURBATIONS IN 2-DIMENSIONAL PLANAR MODEL
[J].
PHYSICAL REVIEW B,
1977, 16 (03)
:1217-1241
[6]
1/N expansion for two-dimensional quantum ferromagnets
[J].
PHYSICAL REVIEW B,
1998, 58 (03)
:1464-1484