Work

Doping-driven antiferromagnetic insulator-superconductor transition: A quantum Monte Carlo study

Year: 2022

Type: article

Abstract: How superconductivity emerges in the vicinity of an antiferromagnetic insulating state is a long-standing issue of strong correlation physics. We study the transition from an antiferromagnetic insulator to a superconductor by hole doping based on a bilayer generalization of a Hubbard model. The projector quantum Monte Carlo simulations are employed, which are sign problem free both at and away from half filling. An anisotropic Ising antiferromagnetic Mott insulating phase occurs at half filling, which is weakened by hole doping. Below a critical doping value, antiferromagnetism coexists with the singlet superconductivity, which is a pairing across each rung with an extended $s$-wave symmetry. As doping further increases, the antiferromagnetic order vanishes, leaving only a superconducting phase. These results provide important information on how superconductivity appears upon doping the parent Mott-insulating state.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.106.054510

Authors: Tianxing Ma, Da Wang, Congjun Wu

Institutions: Beijing Normal University, University of California San Diego, National Laboratory of Solid State Microstructures, Nanjing University, Westlake University

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, Beijing Normal University

Awards: G1253933300, 非常规或拓扑超导新体系的理论探索及物性研究, G5243300597, G6495783628, G6888354234