Antiferromagnetic Phase Transition and Crossover to Fermi Liquid Phase in a Weakly Coupled Half-Filled Chain System
Antiferromagnetic Phase Transition and Crossover to Fermi Liquid Phase in a Weakly Coupled Half-Filled Chain System
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弱耦合半满链系统中的反铁磁相变和费米液相交叉
DOI：
10.1143/jpsj.67.2590
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发表时间：
1998
影响因子：
1.7
通讯作者：
K. Yonemitsu
中科院分区：
文献类型：
--
作者：
J. Kishine;K. Yonemitsu
本文用微扰重整化群方法研究了弱耦合半满链系统中链内电子-电子umklapp过程和链间单粒子跳跃效应。通过求解标度方程，我们发现链内umklapp过程强烈地抑制了链间单粒子过程，并导致了有限的临界值。对于t_（？）t_（？）c，系统经历到费米液相的交叉，在那里准粒子的链间相干传播发生。
Effects of the intrachain electron-electron umklapp process and the interchain one-particle hopping, t ⊥ , in a weakly coupled half-filled chain system have been studied, based on the perturbative renormalization-group approach. By solving the scaling equations, we found that the intrachain umklapp process strongly suppresses an interchain one-particle process and causes a finite critical value for t ⊥ , t ⊥ c . For t ⊥ t ⊥ c , the system undergoes a crossover to the Fermi liquid phase where the interchain coherent propagation of quasi-particles occurs.