摘要
t_J模型是研究电子强关联作用和高Tc超导理论的重要模型之一.将重正化群流方程方法应用于t_J模型,分别解出了t_J模型在非零温条件下费米子和玻色子元激发能谱的解析式.并将结果与采用格林函数方法求解的结果作了比较,两者基本一致.重正化群流方程方法解出的结果是解析解,而格林函数方法求解的结果是数值解.
The t-J model is one of the most important models that is often used to study the theory of the effect of strong electron correlations and high-T_ c superconductivity. In this article, the method of renormalization group is used to investigate the t-J model, and the elementary excitation energy spectra of t-J model (T≠0) are obtained by the flow equations. The result is compared with that of Green's function method and agrees with its result. At the same time, the result of renormalization group method is the analytical solution while that of Green’s function method is the numerical solution.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第8期3764-3767,共4页
Acta Physica Sinica
