Quantum phase transitions in two-dimensional strongly correlated fermion systems

doi:10.1007/s11467-015-0498-5

Front. Phys.

2015, Vol. 10

Issue (5) : 106401 https://doi.org/10.1007/s11467-015-0498-5

REVIEW ARTICLE

Quantum phase transitions in two-dimensional strongly correlated fermion systems

Bao An（保安）^1,^3,^*(

),Chen Yao-Hua（陈耀华）²,Lin Heng-Fu（林恒福）²,Liu Hai-Di（刘海迪）²,Zhang Xiao-Zhong（章晓中）¹

1. Laboratory of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
2. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3. Key Laboratory of Integrated Exploitation of Bayan-Obo Multi-Metal Resources, Inner Mongolia University of Science & Technology, Baotou 014010, China

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Abstract

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.

Keywords quantum phase transition two-dimensional lattices fermions cellular dynamical mean-field theory continuous-time quantum Monte Carlo

Corresponding Author(s): Bao An（保安）

Issue Date: 26 October 2015

Cite this article:

Bao An（保安）,Chen Yao-Hua（陈耀华）,Lin Heng-Fu（林恒福）, et al. Quantum phase transitions in two-dimensional strongly correlated fermion systems[J]. Front. Phys. , 2015, 10(5): 106401.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-015-0498-5
https://academic.hep.com.cn/fop/EN/Y2015/V10/I5/106401

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