Truncated Lanczos method: Application to hole-doped spin ladders

被引：6

作者：

Chiappa, O ^{[1
]}

Capponi, S

Poilblanc, D

机构：

[1] Univ Toulouse 3, Phys Quant Lab, F-31062 Toulouse, France

[2] Univ Toulouse 3, CNRS, UMR 5626, F-31062 Toulouse, France

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.63.115120

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The truncated Lanczos method using a variational scheme based on Hilbert space reduction as well as a local basis change [Dagotto er al., Phys. Rev. B 58, 12 063 (1998)] is reexamined. The energy is extrapolated as a power-law function of the Hamiltonian variance. This systematic extrapolation procedure is tested quantitatively on the two-leg t-J ladder doped with two holes. For this purpose, we have carried out calculations:of the spin gap and of the pair dispersion up to size 2x15.

引用

页数：3

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