|
|
|
Field induced Chern insulating states in twisted monolayer-bilayer graphene |
| Zhengwen Wang(王政文)1,2, Yingzhuo Han(韩英卓)1, Kenji Watanabe3, Takashi Taniguchi3, Yuhang Jiang(姜宇航)2,†, and Jinhai Mao(毛金海)1,‡ |
1 School of Physical Science and CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China;
2 College of Materials Science and Optoelectronic Technology, Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
3 Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba 305-0044, Japan |
|
|
|
|
Abstract Unraveling the mechanism underlying topological phases, notably the Chern insulators (ChIs) in strong correlated systems at the microscopy scale, has captivated significant research interest. Nonetheless, ChIs harboring topological information have not always manifested themselves, owing to the constraints imposed by displacement fields in certain experimental configurations. In this study, we employ density-tuned scanning tunneling microscopy (DT-STM) to investigate the ChIs in twisted monolayer-bilayer graphene (tMBG). At zero magnetic field, we observe correlated metallic states. While under a magnetic field, a metal-insulator transition happens and an integer ChI is formed emanating from the filling index $ s = 3$ with a Chern number $C = 1$. Our results underscore the pivotal role of magnetic fields as a powerful probe for elucidating topological phases in twisted Van der Waals heterostructures.
|
Received: 09 March 2024
Revised: 07 April 2024
Accepted manuscript online: 07 April 2024
|
|
PACS:
|
73.22.Pr
|
(Electronic structure of graphene)
|
| |
73.21.Cd
|
(Superlattices)
|
| |
68.37.Ef
|
(Scanning tunneling microscopy (including chemistry induced with STM))
|
| |
85.30.Tv
|
(Field effect devices)
|
|
Corresponding Authors:
Yuhang Jiang, Jinhai Mao
E-mail: yuhangjiang@ucas.ac.cn;jhmao@ucas.ac.cn
|
Cite this article:
Zhengwen Wang(王政文), Yingzhuo Han(韩英卓), Kenji Watanabe, Takashi Taniguchi, Yuhang Jiang(姜宇航), and Jinhai Mao(毛金海) Field induced Chern insulating states in twisted monolayer-bilayer graphene 2024 Chin. Phys. B 33 067301
|
[1] Bok J M, Bae J J, Choi H Y, Varma C M, Zhang W, He J, Zhang Y, Yu L and Zhou X J 2016 Sci. Adv. 2 e1501329
[2] Garg A, Randeria M and Trivedi N 2008 Nat. Phys. 4 762
[3] Cao Y, Fatemi V, Fang S, Watanabe K, Taniguchi T, Kaxiras E and Jarillo-Herrero P 2018 Nature 556 43
[4] Lake E and Senthil T 2021 Phys. Rev. B 104 174505
[5] Oh M, Nuckolls K P, Wong D, Lee R L, Liu X, Watanabe K, Taniguchi T and Yazdani A 2021 Nature 600 240
[6] Kim H, Choi Y, Lewandowski C, Thomson A, Zhang Y, Polski R, Watanabe K, Taniguchi T, Alicea J and Nadj-Perge S 2022 Nature 606 494
[7] Arita R, Held K, Lukoyanov A V and Anisimov V I 2007 Phys. Rev. Lett. 98 166402
[8] Gegenwart P, Si Q and Steglich F 2008 Nat. Phys. 4 186
[9] Aynajian P, da Silva Neto E H, Gyenis A, Baumbach R E, Thompson J D, Fisk Z, Bauer E D and Yazdani A 2012 Nature 486 201
[10] Cao Y, Fatemi V, Demir A, Fang S, Tomarken S L, Luo J Y, SanchezYamagishi J D, Watanabe K, Taniguchi T, Kaxiras E, Ashoori R C and Jarillo-Herrero P 2018 Nature 556 80
[11] Cao Y, Rodan-Legrain D, Rubies-Bigorda O, Park J M, Watanabe K, Taniguchi T and Jarillo-Herrero P 2020 Nature 583 215
[12] Shen C, Chu Y, Wu Q, Li N, Wang S, Zhao Y, Tang J, Liu J, Tian J, Watanabe K, Taniguchi T, Yang R, Meng Z Y, Shi D, Yazyev O V and Zhang G 2020 Nat. Phys. 16 520
[13] Chen G, Sharpe A L, Fox E J, Zhang Y H, Wang S, Jiang L, Lyu B, Li H, Watanabe K, Taniguchi T, Shi Z, Senthil T, Goldhaber-Gordon D, Zhang Y and Wang F 2020 Nature 579 56
[14] Nuckolls K P, Oh M, Wong D, Lian B, Watanabe K, Taniguchi T, Bernevig B A and Yazdani A 2020 Nature 588 610
[15] Polshyn H, Zhu J, Kumar M A, Zhang Y, Yang F, Tschirhart C L, Serlin M, Watanabe K, Taniguchi T, MacDonald A H and Young A F 2020 Nature 588 66
[16] Rademaker L, Protopopov I V and Abanin D A 2020 Phys. Rev. Res. 2 033150
[17] Choi Y, Kim H, Peng Y, Thomson A, Lewandowski C, Polski R, Zhang Y, Arora H S, Watanabe K, Taniguchi T, Alicea J and Nadj-Perge S 2021 Nature 589 536
[18] Pierce A T, Xie Y, Park J M, Khalaf E, Lee S H, Cao Y, Parker D E, Forrester P R, Chen S, Watanabe K, Taniguchi T, Vishwanath A, Jarillo-Herrero P and Yacoby A 2021 Nat. Phys. 17 1210
[19] Grover S, Bocarsly M, Uri A, Stepanov P, Di Battista G, Roy I, Xiao J, Meltzer A Y, Myasoedov Y, Pareek K, Watanabe K, Taniguchi T, Yan B, Stern A, Berg E, Efetov D K and Zeldov E 2022 Nat. Phys. 18 885
[20] Polshyn H, Zhang Y, Kumar M A, Soejima T, Ledwith P, Watanabe K, Taniguchi T, Vishwanath A, Zaletel M P and Young A F 2022 Nat. Phys. 18 42
[21] Yu J, Foutty B A, Han Z, Barber M E, Schattner Y, Watanabe K, Taniguchi T, Phillips P, Shen Z X, Kivelson S A and Feldman B E 2022 Nat. Phys. 18 825
[22] Jiang Y, Lai X, Watanabe K, Taniguchi T, Haule K, Mao J and Andrei E Y 2019 Nature 573 91
[23] Wong D, Nuckolls K P, Oh M, Lian B, Xie Y, Jeon S, Watanabe K, Taniguchi T, Bernevig B A and Yazdani A 2020 Nature 582 198
[24] Li S Y, Wang Z, Xue Y, Wang Y, Zhang S, Liu J, Zhu Z, Watanabe K, Taniguchi T, Gao H J, Jiang Y and Mao J 2022 Nat. Commun. 13 4225
[25] Zhang C, Zhu T, Soejima T, Kahn S, Watanabe K, Taniguchi T, Zettl A, Wang F, Zaletel M P and Crommie M F 2023 Nat. Commun. 14 3595
[26] Yankowitz M, Ma Q, Jarillo-Herrero P and LeRoy B J 2019 Nat. Rev. Phys. 1 112
[27] Behura S K, Miranda A, Nayak S, Johnson K, Das P and Pradhan N R 2021 Emergent Mater. 4 813
[28] Xie Y, Pierce A T, Park J M, Parker D E, Khalaf E, Ledwith P, Cao Y, Lee S H, Chen S, Forrester P R, Watanabe K, Taniguchi T, Vishwanath A, Jarillo-Herrero P and Yacoby A 2021 Nature 600 439
[29] Bhowmik S, Ghawri B, Leconte N, Appalakondaiah S, Pandey M, Mahapatra P S, Lee D, Watanabe K, Taniguchi T, Jung J, Ghosh A and Chandni U 2022 Nat. Phys. 18 639
[30] Li X F, Sun R X, Wang S Y, Li X, Liu Z B and Tian J G 2022 Chin. Phys. Lett. 39 037301
[31] He M, Li Y, Cai J, Liu Y, Watanabe K, Taniguchi T, Xu X and Yankowitz M 2021 Nat. Phys. 17 26
[32] Liu X, Chiu C L, Lee J Y, Farahi G, Watanabe K, Taniguchi T, Vishwanath A and Yazdani A 2021 Nat. Commun. 12 2732
[33] Rubio-Verdú C, Turkel S, Song Y, Klebl L, Samajdar R, Scheurer M S, Venderbos J W F, Watanabe K, Taniguchi T, Ochoa H, Xian L, Kennes D M, Fernandes R M, Rubio A and Pasupathy Á N 2022 Nat. Phys. 18 196
[34] Chen S, He M, Zhang Y H, Hsieh V, Fei Z, Watanabe K, Taniguchi T, Cobden D H, Xu X, Dean C R and Yankowitz M 2021 Nat. Phys. 17 374
[35] Xu S, Al Ezzi M M, Balakrishnan N, Garcia-Ruiz A, Tsim B, Mullan C, Barrier J, Xin N, Piot B A, Taniguchi T, Watanabe K, Carvalho A, Mishchenko A, Geim A K, Fal’ko V I, Adam S, Neto A H C, Novoselov K S and Shi Y 2021 Nat. Phys. 17 619
[36] Li S, Wang Z, Xue Y, Cao L, Watanabe K, Taniguchi T, Gao H and Mao J 2023 Chin. Phys. B 32 067304
[37] Tong Q, Yu H, Zhu Q, Wang Y, Xu X and Yao W 2017 Nat. Phys. 13 356
[38] Tran K, Moody G, Wu F, et al. 2019 Nature 567 71
[39] Xu Y, Liu S, Rhodes D A, Watanabe K, Taniguchi T, Hone J, Elser V, Mak K F and Shan J 2020 Nature 587 214
[40] Huang X, Wang T, Miao S, Wang C, Li Z, Lian Z, Taniguchi T, Watanabe K, Okamoto S, Xiao D, Shi S F and Cui Y T 2021 Nat. Phys. 17 715
[41] Kometter C R, Yu J, Devakul T, Reddy A P, Zhang Y, Foutty B A, Watanabe K, Taniguchi T, Fu L and Feldman B E 2023 Nat. Phys. 19 1861
[42] Spanton E M, Zibrov A A, Zhou H, Taniguchi T, Watanabe K, Zaletel M P and Young A F 2018 Science 360 62
[43] Cao Y, Luo J Y, Fatemi V, Fang S, Sanchez-Yamagishi J D, Watanabe K, Taniguchi T, Kaxiras E and Jarillo-Herrero P 2016 Phys. Rev. Lett. 117 116804 |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
Altmetric
|
|
blogs
Facebook pages
Wikipedia page
Google+ users
|
Online attention
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
View more on Altmetrics
|
|
|
