平面四费米系统的磁化
Magnetization of Planar Four-Fermion Systems
摘要：
我们考虑一个平面费米子系统，在有限的温度和密度下，在平行于二维平面的静态磁场中。该磁场产生塞曼效应，然后产生系统的自旋极化。从朗道自由能出发研究了临界性质。平面系统，如聚合物薄膜和石墨烯的磁化可能观察到的后果进行了讨论。
英文摘要：
We consider a planar system of fermions, at finite temperature and density, under a static magnetic field parallel to the two-dimensional plane. This magnetic field generates a Zeeman effect and, then, a spin polarization of the system. The critical properties are studied from the Landau's free energy. The possible observable consequences of the magnetization of planar systems such as polymer films and graphene are discussed.
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