Quantum phase transitions in two-dimensional strongly correlated fermion systems
Quantum phase transitions in two-dimensional strongly correlated fermion systems
复制标题
二维强相关费米子系统中的量子相变
DOI：
10.1007/s11467-015-0498-5
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发表时间：
2015
影响因子：
7.5
通讯作者：
Zhang Xiao-Zhong
中科院分区：
文献类型：
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作者：
Bao An;Chen Yao-Hua;Lin Heng-Fu;Liu Hai-Di;Zhang Xiao-Zhong
本文综述了近年来我们在二维强关联费米子系统量子相变方面的工作。我们讨论了这些系统的金属-绝缘体的过渡性质，通过计算态密度，双占有率，费米面的演变，使用细胞动力学平均场理论（CDMFT）和连续时间量子蒙特卡罗算法的组合。此外，我们还通过定义磁序参数来研究各个态的磁性。在具有强关联费米子的二维晶格中，我们发现了包含反铁磁金属、顺磁金属、近藤金属和铁磁绝缘体等多种有趣量子态的丰富相图。我们相信，我们的结果将导致更好地了解真实的材料的属性。
In this article, we review our recent work on quantum phase transition in two-dimensional strongly correlated fermion systems. We discuss the metal–insulator transition properties of these systems by calculating the density of states, double occupancy, and Fermi surface evolution using a combination of the cellular dynamical mean-field theory (CDMFT) and the continuous-time quantum Monte Carlo algorithm. Furthermore, we explore the magnetic properties of each state by defining magnetic order parameters. Rich phase diagrams with many intriguing quantum states, including antiferromagnetic metal, paramagnetic metal, Kondo metal, and ferromagnetic insulator, were found for the two-dimensional lattices with strongly correlated fermions. We believe that our results would lead to a better understanding of the properties of real materials.