Fluctuation effects of gauge fields in the Slave-Boson t-J model
Fluctuation effects of gauge fields in the Slave-Boson t-J model
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Slave-Boson t-J 模型中规范场的涨落效应
DOI：
10.1143/jpsj.67.543
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
K. Sakakibara
中科院分区：
文献类型：
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作者：
I. Ichinose;T. Matsui;K. Sakakibara
本文对高温超导体t-J模型的U（1）规范理论中的电荷自旋分离（CSS）现象进行了定量研究。我们计算了束缚-解除束缚相变的临界温度T CSS作为空穴掺杂δ的函数，低于该临界温度，CSS发生。规范场的涨落是如此之大，以至于T CSS减小到其平均场值的10%左右。我们还从规范理论的角度对相结构作了一些评论。
We present a quantitative study of the charge-spin separation (CSS) phenomenon in a U(1) gauge theory of the t-J model of high- T c superconductors. We calculate the critical temperature T CSS of a confinement-deconfinement phase transition as a function of hole doping δ, below which the CSS takes place. Fluctuations of gauge fields are so large that T CSS is reduced to about 10% of its mean-field value. We also make some comments on the phase structure from a gauge-theoretical point of view.