Abstract

A study is preformed of the relationship between the spectrum of low-energy collective excitations in two-dimensional Fermi liquids and the paramagnet/ferromagnet phase transition in the quantum Hall state with filling factor v = 2. It is shown theoretically and experimentally that the softening of the energy of collective spin–flip excitations accompanies the spontaneous switching of the spin configuration of the system from the paramagnetic to the ferromagnetic phase.

中文翻译：

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库仑相关性是填充因子v = 2的量子霍尔态中铁磁跃迁的根本原因

摘要

进行了二维费米液体中低能集体激发光谱与填充因子为v = 2的量子霍尔态下顺磁体/铁磁体相变之间关系的研究。自旋翻转激发的能量的一部分伴随着系统自旋配置从顺磁相到铁磁相的自发切换。