Quantum phase transitions in two-dimensional strongly correlated fermion systems

被引：7

作者：

Bao, An ^{[1
,3
]}

Chen, Yao-Hua ^{[2
]}

Lin, Heng-Fu ^{[2
]}

Liu, Hai-Di ^{[2
]}

Zhang, Xiao-Zhong ^{[1
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, Adv Mat Lab, Beijing 100084, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[3] Inner Mongolia Univ Sci & Technol, Key Lab Integrated Exploitat Bayan Obo Multi Met, Baotou 014010, Peoples R China

来源：

FRONTIERS OF PHYSICS | 2015年 / 10卷 / 05期

基金：

美国国家科学基金会;

关键词：

quantum phase transition; two-dimensional lattices; fermions; cellular dynamical mean-field theory; continuous-time quantum Monte Carlo; ELECTRON CORRELATIONS; COLLECTIVE MOTIONS; KAGOME LATTICE; ENERGY; MODELS; TERMS; STATE;

D O I：

10.1007/s11467-015-0498-5

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：20

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