Spin-Peierls系统中的元激发谱

The Elementary Excitation in Spin Peierls System

用玻色化方法和量子自洽方法研究了Spin -Peierls系统的元激发谱 ,分别计算和讨论了二聚化相的基态和单粒子激发态的能量以及阻挫对其低能行为的影响 .结果表明 ,随着阻挫的增大 ,Spin -Peierls系统中的基态能量会逐渐减小 。

Using bosonization and quantum self-consistent method,the elementary excitation of Spin-Peierls(SP)system is studied. We calculate and discuss ground state and the one-particle excited state of the SP system. By analyzing the self-consistent equation of K, we obtain that the SP system exhibits two phases, i.e. gapful dimerized phase and gapless antiferromagnetic phase. The variation of the ground state and energy gap with frustration parameter has also been investigated.