Abstract

The thermodynamic stability of quantum Hall ferromagnets with filling factors ν = 1 and ν = 2 is studied via inelastic light scattering in strongly interacting two-dimensional electronic systems based on ZnO. For a ferromagnet with ν = 2, it is found that the Curie temperature is determined by the Coulomb energy of the formation of domain walls. For a ferromagnet with ν = 1, the thermodynamic stability is determined by the Zeeman splitting of the spin sublevels.

中文翻译：

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量子霍尔铁磁体的热力学

摘要

在基于ZnO的强相互作用二维电子系统中，通过非弹性光散射研究了填充因子ν= 1和ν= 2的量子霍尔铁磁体的热力学稳定性。对于ν= 2的铁磁体，发现居里温度由畴壁形成的库仑能量决定。对于ν= 1的铁磁体，热力学稳定性取决于自旋子能级的塞曼分裂。