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Robust supermoiré pattern in large-angle single-twist bilayers

delete2025-05-16
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PRE
AI
Y
Yanxing Li
C
Chuqiao Shi
L
Liu, Xiaohui
X
Xue, Yuan
H
Ha, Viet-Anh
G
Gao, Qiang
D
Dong, Chengye
L
Lin, Yu-Chuan
H
Holtzman, Luke N.
M
Morales-Duran, Nicolas
K
Kim, Hyunsue
J
Jiang, Yi
H
Holbrook, Madisen
B
Barmak, Katayun
R
Robinson, Joshua A.
L
Li, Xiaoqin
G
Giustino, Feliciano
K
Khalaf, Eslam
S
Shih, Chih-Kang *
DOI:10.1038/s41567-025-02914-9delete
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摘要

摘要

En 中文
通过在两层之间具有小角度扭转的范德瓦尔斯双层中形成长波长莫尔超晶格,是创建莫尔平带的关健方法。然而,对于小扭转角,强烈的晶格重构会在莫尔图案中产生畴壁和其他形式的无序,给工程化此类平台带来相当大的挑战。在大扭转角下,晶格更为刚性,但在短波长莫尔超晶格中难以产生平带。在此,我们介绍了一种通过仅使用接近公度角的单次扭转来定制鲁棒超莫尔结构的方法(适用于过渡金属二硫族化物双层)。结构上,我们展示了三种不等效公度莫尔堆叠的周期性排列的自发形成,其中与公度角的角偏差决定了周期性。电子学上,我们发现了一组范霍夫奇点,表明存在强烈的带杂化,导致价带顶附近出现平带。本研究将能带拓扑、量子几何与莫尔超导性的相互作用研究扩展到了大扭转角区域。
Keyword:
ELECTRON-TUNNELING SPECTROSCOPY
UNCONVENTIONAL SUPERCONDUCTIVITY
PTYCHOGRAPHY

期刊

Nature Physics 封面图
Nature Physics
IF:
18.4
论文数:
6.7K
被引数:
5.7W

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