Orderly disorder in magic-angle twisted trilayer graphene

被引：109

作者：

Turkel, Simon ^{[1
]}

Swann, Joshua ^{[1
]}

Zhu, Ziyan ^{[2
]}

Christos, Maine ^{[2
]}

Watanabe, K. ^{[3
]}

Taniguchi, T. ^{[4
]}

Sachdev, Subir ^{[2
,5
]}

Scheurer, Mathias S. ^{[6
]}

Kaxiras, Efthimios ^{[2
,7
]}

Dean, Cory R. ^{[1
]}

Pasupathy, Abhay N. ^{[1
,8
]}

机构：

[1] Columbia Univ, Dept Phys, New York, NY 10027 USA

[2] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[3] Natl Inst Mat Sci, Res Ctr Funct Mat, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan

[4] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton, 1-1 Namiki, Tsukuba, Ibaraki 3050044, Japan

[5] Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA

[6] Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria

[7] Harvard Univ, John A Paulson Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[8] Brookhaven Natl Lab, Condensed Matter Phys & Mat Sci Dept, Upton, NY 11973 USA

来源：

SCIENCE | 2022年 / 376卷 / 6589期

基金：

美国国家科学基金会;

关键词：

SUPERCONDUCTIVITY;

D O I：

10.1126/science.abk1895

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Magic-angle twisted trilayer graphene (TTG) has recently emerged as a platform to engineer strongly correlated flat bands. We reveal the normal-state structural and electronic properties of TTG using low-temperature scanning tunneling microscopy at twist angles for which superconductivity has been observed. Real trilayer samples undergo a strong reconstruction of the moire lattice, which locks layers into near-magic-angle, mirror symmetric domains comparable in size with the superconducting coherence length. This relaxation introduces an array of localized twist-angle faults, termed twistons and moire solitons, whose electronic structure deviates strongly from the background regions, leading to a doping-dependent, spatially granular electronic landscape. The Fermi-level density of states is maximally uniform at dopings for which superconductivity has been observed in transport measurements.

引用

页码：193 / +

页数：38

共 53 条

[1] THEORY OF DIRTY SUPERCONDUCTORS [J].