Magnetically Ordered State of Cold Fermions on a Decorated Square Lattice
Magnetically Ordered State of Cold Fermions on a Decorated Square Lattice
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DOI：
10.1007/s10909-009-0042-5
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发表时间：
2010
影响因子：
2
通讯作者：
Kazuto Noda;A. Koga;N. Kawakami;T. Pruschke
中科院分区：
文献类型：
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作者：
Kazuto Noda;A. Koga;N. Kawakami;T. Pruschke
我们研究了两个分量的超冷费米子与排斥相互作用，这是加载到一个装饰的正方形晶格。结合实空间动力学平均场理论和数值重整化群方法，我们讨论了系统的磁性。它是澄清如何铁磁有序的基态，这是稳定的平带机制，是螺旋连接到亚铁磁有序状态预期在强耦合限制。
We study two-component ultracold fermions with repulsive interactions, which are loaded into a decorated square lattice. By combining the real-space dynamical mean-field theory with the numerical renormalization group method, we discuss magnetic properties in the system. It is clarified how the ferromagnetically ordered ground state, which is stabilized by a flat band mechanism, is adiabatically connected to the ferrimagnetically ordered state expected in the strong coupling limit.