Emergence of Correlations in Alternating Twist Quadrilayer Graphene
| dc.creator | Burg, G. William | |
| dc.creator | Khalaf, Eslam | |
| dc.creator | Wang, Yimeng | |
| dc.creator | Watanabe, Kenji | |
| dc.creator | Taniguchi, Takashi | |
| dc.creator | Tutuc, Emanuel | |
| dc.date.accessioned | 2024-02-13T14:46:04Z | |
| dc.date.available | 2024-02-13T14:46:04Z | |
| dc.date.issued | 2022-05-11 | |
| dc.description.abstract | Recently, alternating twist multilayer graphene (ATMG) has emerged as a family of moiré systems that share several fundamental properties with twisted bilayer graphene, and are expected to host similarly strong electron-electron interactions near the magic angle. Here, we study alternating twist quadrilayer graphene (ATQG) samples with twist angles of 1.96° and 1.52°, which are slightly removed from the magic angle of 1.68°. At the larger angle, we find signatures of correlated insulators only when the ATQG is hole doped, and no signatures of superconductivity, and for the smaller angle we find evidence of superconductivity, while signs of the correlated insulators weaken. Our results provide insight into the twist angle dependence of correlated phases in ATMG and shed light on the nature of correlations in the intermediate coupling regime at the edge of the magic angle range where dispersion and interaction are of the same order. | |
| dc.description.department | Center for Dynamics and Control of Materials | |
| dc.description.sponsorship | The work at The University of Texas at Austin was supported by the National Science Foundation (NSF) grants MRSECDMR-1720595, and EECS-2122476; Army Research Office under grant no. W911NF-17- 1-0312; and the Welch Foundation grant F-2018-20190330. Work was partly done at the Texas Nanofabrication Facility supported by the NSF grant no. NNCI-2025227. K.W. and T.T. acknowledge support from the Elemental Strategy Initiative conducted by the MEXT, Japan (grant no. JPMXP0112101001), and JSPS KAKENHI (grant nos. JP19H05790 and JP20H00354). | |
| dc.identifier.doi | https://doi.org/10.48550/arXiv.2201.01637 | |
| dc.identifier.uri | https://hdl.handle.net/2152/123661 | |
| dc.identifier.uri | https://doi.org/10.26153/tsw/50455 | |
| dc.language.iso | en_US | |
| dc.relation.ispartof | Center for Dynamics and Control of Materials Publications | |
| dc.rights.restriction | Open | |
| dc.subject | Graphene | |
| dc.title | Emergence of Correlations in Alternating Twist Quadrilayer Graphene | |
| dc.type | Article |