Signature of Correlated Insulator in Electric Field Controlled Superlattice

Sun, Jiacheng; Akbar Ghorashi, Sayed Ali; Watanabe, Kenji; Taniguchi, Takashi; Camino, Fernando; Cano, Jennifer; Du, Xu

doi:10.1021/acs.nanolett.4c03238

Title: Signature of Correlated Insulator in Electric Field Controlled Superlattice

Journal Article · 20 October 2024 · Nano Letters

DOI: https://doi.org/10.1021/acs.nanolett.4c03238 · OSTI ID:2480275

Sun, Jiacheng ^[1]; Akbar Ghorashi, Sayed Ali ^[1];

^[2];

^[2]; Camino, Fernando ^[3]; Cano, Jennifer ^[4];

^[1]

Stony Brook Univ., NY (United States)
National Institute for Materials Science (NIMS), Tsukuba (Japan)
Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Stony Brook Univ., NY (United States); Flatiron Institute, New York, NY (United States)

On a two-dimensional crystal, a “superlattice” with nanometer-scale periodicity can be imposed to tune the Bloch electron spectrum, enabling novel physical properties inaccessible in the original crystal. While creating 2D superlattices by means of nanopatterned electric gates has been studied for band structure engineering in recent years, evidence of electron correlations-which drive many problems at the forefront of physics research-remains to be uncovered. Here, in this work, we demonstrate signatures of a correlated insulator phase in Bernal-stacked bilayer graphene modulated by a gate-defined superlattice potential, manifested as resistance peaks centered at integer multiples of single electron per superlattice unit cell carrier densities. The observation is consistent with the formation of a stack of flat low-energy bands due to the superlattice potential combined with inversion symmetry breaking. Our work paves the way to custom-designed superlattices for studying band structure engineering and strongly correlated electrons in 2D materials.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: Japan Society for the Promotion of Science (JSPS); National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: SC0012704

OSTI ID:: 2480275

Report Number(s):: BNL--226394-2024-JAAM

Journal Information:: Nano Letters, Journal Name: Nano Letters Journal Issue: 43 Vol. 24; ISSN 1530-6984

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

References (32)

Gate-Tunable Two-Dimensional Superlattices in Graphene Huber, Robin; Liu, Ming-Hao; Chen, Szu-Chao Nano Letters, Vol. 20, Issue 11 https://doi.org/10.1021/acs.nanolett.0c03021	journal	October 2020
Correlated insulator behaviour at half-filling in magic-angle graphene superlattices Cao, Yuan; Fatemi, Valla; Demir, Ahmet Nature, Vol. 556, Issue 7699 https://doi.org/10.1038/nature26154	journal	March 2018
Unconventional superconductivity in magic-angle graphene superlattices Cao, Yuan; Fatemi, Valla; Fang, Shiang Nature, Vol. 556, Issue 7699 https://doi.org/10.1038/nature26160	journal	March 2018
Substrate-induced bandgap opening in epitaxial graphene Zhou, S. Y.; Gweon, G. -H.; Fedorov, A. V. Nature Materials, Vol. 6, Issue 10 https://doi.org/10.1038/nmat2003	journal	September 2007
Gate-induced insulating state in bilayer graphene devices Oostinga, Jeroen B.; Heersche, Hubert B.; Liu, Xinglan Nature Materials, Vol. 7, Issue 2 https://doi.org/10.1038/nmat2082	journal	December 2007
Magic in twisted transition metal dichalcogenide bilayers Devakul, Trithep; Crépel, Valentin; Zhang, Yang Nature Communications, Vol. 12, Issue 1 https://doi.org/10.1038/s41467-021-27042-9	journal	November 2021
Isospin competitions and valley polarized correlated insulators in twisted double bilayer graphene Liu, Le; Zhang, Shihao; Chu, Yanbang Nature Communications, Vol. 13, Issue 1 https://doi.org/10.1038/s41467-022-30998-x	journal	June 2022
Engineering high quality graphene superlattices via ion milled ultra-thin etching masks Barcons Ruiz, David; Herzig Sheinfux, Hanan; Hoffmann, Rebecca Nature Communications, Vol. 13, Issue 1 https://doi.org/10.1038/s41467-022-34734-3	journal	November 2022
Band structure engineering of 2D materials using patterned dielectric superlattices Forsythe, Carlos; Zhou, Xiaodong; Watanabe, Kenji Nature Nanotechnology, Vol. 13, Issue 7 https://doi.org/10.1038/s41565-018-0138-7	journal	May 2018
Anisotropic band flattening in graphene with one-dimensional superlattices Li, Yutao; Dietrich, Scott; Forsythe, Carlos Nature Nanotechnology, Vol. 16, Issue 5 https://doi.org/10.1038/s41565-021-00849-9	journal	February 2021
Correlated states in twisted double bilayer graphene Shen, Cheng; Chu, Yanbang; Wu, QuanSheng Nature Physics, Vol. 16, Issue 5 https://doi.org/10.1038/s41567-020-0825-9	journal	March 2020
Flat bands in twisted bilayer transition metal dichalcogenides Zhang, Zhiming; Wang, Yimeng; Watanabe, Kenji Nature Physics https://doi.org/10.1038/s41567-020-0958-x	journal	July 2020
Bulk and edge properties of twisted double bilayer graphene Wang, Yimeng; Herzog-Arbeitman, Jonah; Burg, G. William Nature Physics, Vol. 18, Issue 1 https://doi.org/10.1038/s41567-021-01419-5	journal	December 2021
Superconductors, orbital magnets and correlated states in magic-angle bilayer graphene Lu, Xiaobo; Stepanov, Petr; Yang, Wei Nature, Vol. 574, Issue 7780 https://doi.org/10.1038/s41586-019-1695-0	journal	October 2019
Tunable correlated Chern insulator and ferromagnetism in a moiré superlattice Chen, Guorui; Sharpe, Aaron L.; Fox, Eli J. Nature, Vol. 579, Issue 7797 https://doi.org/10.1038/s41586-020-2049-7	journal	March 2020
Simulation of Hubbard model physics in WSe2/WS2 moiré superlattices Tang, Yanhao; Li, Lizhong; Li, Tingxin Nature, Vol. 579, Issue 7799 https://doi.org/10.1038/s41586-020-2085-3	journal	March 2020
Mott and generalized Wigner crystal states in WSe2/WS2 moiré superlattices Regan, Emma C.; Wang, Danqing; Jin, Chenhao Nature, Vol. 579, Issue 7799 https://doi.org/10.1038/s41586-020-2092-4	journal	March 2020
Correlated insulating states at fractional fillings of moiré superlattices Xu, Yang; Liu, Song; Rhodes, Daniel A. Nature, Vol. 587, Issue 7833 https://doi.org/10.1038/s41586-020-2868-6	journal	November 2020
Strongly correlated Chern insulators in magic-angle twisted bilayer graphene Nuckolls, Kevin P.; Oh, Myungchul; Wong, Dillon Nature, Vol. 588, Issue 7839 https://doi.org/10.1038/s41586-020-3028-8	journal	December 2020
Fractional Chern insulators in magic-angle twisted bilayer graphene Xie, Yonglong; Pierce, Andrew T.; Park, Jeong Min Nature, Vol. 600, Issue 7889 https://doi.org/10.1038/s41586-021-04002-3	journal	December 2021
Reproducibility in the fabrication and physics of moiré materials Lau, Chun Ning; Bockrath, Marc W.; Mak, Kin Fai Nature, Vol. 602, Issue 7895 https://doi.org/10.1038/s41586-021-04173-z	journal	February 2022
Evidence for unconventional superconductivity in twisted trilayer graphene Kim, Hyunjin; Choi, Youngjoon; Lewandowski, Cyprian Nature, Vol. 606, Issue 7914 https://doi.org/10.1038/s41586-022-04715-z	journal	June 2022
Layer-by-Layer Insight into Electrostatic Charge Distribution of Few-Layer Graphene Rokni, Hossein; Lu, Wei Scientific Reports, Vol. 7, Issue 1 https://doi.org/10.1038/srep42821	journal	February 2017
Patterned bilayer graphene as a tunable strongly correlated system Krix, Z. E.; Sushkov, O. P. Physical Review B, Vol. 107, Issue 16 https://doi.org/10.1103/PhysRevB.107.165158	journal	April 2023
Commensurability Oscillations in One-Dimensional Graphene Superlattices Drienovsky, Martin; Joachimsmeyer, Jonas; Sandner, Andreas Physical Review Letters, Vol. 121, Issue 2 https://doi.org/10.1103/PhysRevLett.121.026806	journal	July 2018
Topological and Stacked Flat Bands in Bilayer Graphene with a Superlattice Potential Ghorashi, Sayed Ali Akbar; Dunbrack, Aaron; Abouelkomsan, Ahmed Physical Review Letters, Vol. 130, Issue 19 https://doi.org/10.1103/PhysRevLett.130.196201	journal	May 2023
Correlated Insulators, Semimetals, and Superconductivity in Twisted Trilayer Graphene Christos, Maine; Sachdev, Subir; Scheurer, Mathias S. Physical Review X, Vol. 12, Issue 2 https://doi.org/10.1103/PhysRevX.12.021018	journal	April 2022
Controlling the Electronic Structure of Bilayer Graphene Ohta, Taisuke; Bostwick, Aaron; Seyller, Thomas Science, Vol. 313, Issue 5789 https://doi.org/10.1126/science.1130681	journal	August 2006
Tuning superconductivity in twisted bilayer graphene Yankowitz, Matthew; Chen, Shaowen; Polshyn, Hryhoriy Science, Vol. 363, Issue 6431 https://doi.org/10.1126/science.aav1910	journal	January 2019
Intrinsic quantized anomalous Hall effect in a moiré heterostructure Serlin, M.; Tschirhart, C. L.; Polshyn, H. Science, Vol. 367, Issue 6480 https://doi.org/10.1126/science.aay5533	journal	December 2019
Correlated electron-hole state in twisted double-bilayer graphene Rickhaus, Peter; de Vries, Folkert K.; Zhu, Jihang Science, Vol. 373, Issue 6560 https://doi.org/10.1126/science.abc3534	journal	September 2021
Electric field–tunable superconductivity in alternating-twist magic-angle trilayer graphene Hao, Zeyu; Zimmerman, A. M.; Ledwith, Patrick Science, Vol. 371, Issue 6534 https://doi.org/10.1126/science.abg0399	journal	February 2021

Similar Records

Engineering correlated insulators in bilayer graphene with a remote Coulomb superlattice

Journal Article · 2024 · Nature Materials · OSTI ID:2466153

Zhang, Zuocheng; Xie, Jingxu; Zhao, Wenyu; +9 more

Spectroscopy of a tunable moiré system with a correlated and topological flat band

Journal Article · 2021 · Nature Communications · OSTI ID:1782754

Liu, Xiaomeng; Chiu, Cheng-Li; Lee, Jong Yeon; +5 more

Synthetic Band Structure Engineering of Graphene Using Block Copolymer-Templated Dielectric Superlattices

Journal Article · 2025 · ACS Nano · OSTI ID:2543024

Jamalzadeh, Moeid; Zhang, Zihan; Huang, Zhujun; +7 more

Related Subjects

36 MATERIALS SCIENCE
bilayer graphene
correlated electrons
quantum transport
superlattice

Title: Signature of Correlated Insulator in Electric Field Controlled Superlattice

Citation Formats

References (32)

Similar Records

Related Subjects