Interaction effects and superconductivity signatures in twisted double-bilayer WSe2

被引：94

作者：

An, Liheng ^{[1
,2
]}

Cai, Xiangbin ^{[1
,2
]}

Pei, Ding ^{[3
]}

Huang, Meizhen ^{[1
,2
]}

Wu, Zefei ^{[1
,2
]}

Zhou, Zishu ^{[1
,2
]}

Lin, Jiangxiazi ^{[1
,2
]}

Ying, Zhehan ^{[1
,2
]}

Ye, Ziqing ^{[1
,2
]}

Feng, Xuemeng ^{[1
,2
]}

Gao, Ruiyan ^{[1
,2
]}

Cacho, Cephise ^{[4
]}

Watson, Matthew ^{[4
]}

Chen, Yulin ^{[3
]}

Wang, Ning ^{[1
,2
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Phys, Ctr Quantum Mat, Clear Water Bay, Hong Kong, Peoples R China

[2] Hong Kong Univ Sci & Technol, Willian Mang Inst Nano Sci & Technol, Clear Water Bay, Hong Kong, Peoples R China

[3] Univ Oxford, Clarendon Lab, Dept Phys, Parks Rd, Oxford OX1 3PU, England

[4] Diamond Light Source, Harwell Campus, Didcot OX11 0DE, Oxon, England

来源：

NANOSCALE HORIZONS | 2020年 / 5卷 / 09期

基金：

英国工程与自然科学研究理事会;

关键词：

MOIRE BANDS; INSULATOR;

D O I：

10.1039/d0nh00248h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Twisted bilayer graphene provides a new two-dimensional platform for studying electron interaction phenomena and flat band properties such as correlated insulator transition, superconductivity and ferromagnetism at certain magic angles. Here, we present experimental characterization of interaction effects and superconductivity signatures in p-type twisted double-bilayer WSe2. Enhanced interlayer interactions are observed when the twist angle decreases to a few degrees as reflected by the high-order satellites in the electron diffraction patterns taken from the reconstructed domains from a conventional moire superlattice. In contrast to twisted bilayer graphene, there is no specific magic angle for twisted WSe2. Flat band properties are observable at twist angles ranging from 1 to 4 degrees. Our work has facilitated future study in the area of flat band related properties in twisted transition metal dichalcogenide layered structures.

引用

页码：1309 / 1316

页数：8

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