High-angular-momentum topological superconductivities in twisted bilayer quasicrystal systems

被引：14

作者：

Liu, Yu-Bo ^{[1
]}

Zhang, Yongyou ^{[1
]}

Chen, Wei-Qiang ^{[2
,3
]}

Yang, Fan ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Phys, Beijing 100081, Peoples R China

[2] Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Dept Phys, Shenzhen 518055, Peoples R China

[3] Southern Univ Sci & Technol, Shenzhen Key Lab Adv Quantum Funct Mat & Devices, Shenzhen 518055, Peoples R China

来源：

PHYSICAL REVIEW B | 2023年 / 107卷 / 01期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

ELECTRONIC-PROPERTIES; CORRELATED STATES; PENROSE LATTICE; TRANSPORT; PHASE;

D O I：

10.1103/PhysRevB.107.014501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electron states in the quasicrystal (QC) are hot topics recently. While previous attentions were focused on such intrinsic QCs as the Penrose lattice, the recent "twistronics" provides us with a new type of QC, i.e., the extrinsic QC, including the 30 degrees-twisted bilayer graphene and 45 degrees-twisted bilayer cuprates as two synthesized examples, unifiedly dubbed as TB-QC. Here we build an efficient microscopic framework to study electron electron interaction driven superconductivities (SCs) in these extrinsic QCs, and find that their nature sits in between those of crystals and intrinsic QCs. Remarkably, our microscopic calculations on the three exemplar TB-QCs reveal various novel topological SCs carrying high angular momenta and high Chern numbers protected by their unique QC symmetries, absent in conventional crystalline materials. The nature of SCs in these extrinsic QCs is also fundamentally different from those in intrinsic QCs in the aspect of pairing-symmetry classifications and topological properties.

引用

页数：10