77 citations · 198 across the 19 of their papers we have counts for
12 papers · 1 filter
Relaxation-driven flat bands and topology in moiré transition metal dichalcogenide heterobilayers
Mitchell Luskin, Max Geier, Liang Fu +1
Moiré transition metal dichalcogenide (TMD) heterobilayers are commonly modeled by a continuum theory that yields topologically trivial bands, in contrast to their homobilayer coun…
Twisted Trilayer Graphene, Quasiperiodic Superconductor
Xinghai Zhang, Ziyan Zhu, Justin H. Wilson +1
Twisted multilayer moiré materials are generically quasiperiodic on the moiré scale due to the interference of different misaligned moiré periodicities. Spatial inhomogeneities suc…
Non-monotonic band flattening near the magic angle of twisted bilayer MoTe
Yujun Deng, William Holtzmann, Ziyan Zhu +13
Twisted bilayer MoTe (tMoTe) is an emergent platform for exploring exotic quantum phases driven by the interplay between nontrivial band topology and strong electron correl…
Tunable atomically enhanced moiré Berry curvatures in twisted triple bilayer graphene
Konstantin Davydov, Ziyan Zhu, Noah Friedman +8
We report a twisted triple bilayer graphene platform consisting of three units of Bernal bilayer graphene consecutively twisted at 1.49° and 1.68°. We demonstrate the atomic recons…
Electron Collimation in Twisted Bilayer Graphene via Gate-defined Moiré Barriers
Wei Ren, Xi Zhang, Ziyan Zhu +6
Electron collimation via a graphene pn-junction allows electrostatic control of ballistic electron trajectories akin to that of an optical circuit. Similar manipulation of novel co…
Harnessing excitons at the nanoscale -- photoelectrical platform for quantitative sensing and imaging
Zhurun Ji, Mark E. Barber, Ziyan Zhu +8
Excitons -- quasiparticles formed by the binding of an electron and a hole through electrostatic attraction -- hold promise in the fields of quantum light confinement and optoelect…
Tunable Inter-Moiré Physics in Consecutively-Twisted Trilayer Graphene
Wei Ren, Konstantin Davydov, Ziyan Zhu +6
We fabricate a twisted trilayer graphene device with consecutive twist angles of 1.33 and 1.64 degrees, in which we electrostatically tune the electronic states from each of the tw…
Helical trilayer graphene: a moiré platform for strongly-interacting topological bands
Li-Qiao Xia, Sergio C. de la Barrera, Aviram Uri +9
Quantum geometry of electronic wavefunctions results in fascinating topological phenomena. A prominent example is the intrinsic anomalous Hall effect (AHE) in which a Hall voltage…
Electronic ratchet effect in a moiré system: signatures of excitonic ferroelectricity
Zhiren Zheng, Xueqiao Wang, Ziyan Zhu +17
Electronic ferroelectricity represents a new paradigm where spontaneous symmetry breaking driven by electronic correlations, in contrast to traditional lattice-driven ferroelectric…
Twisto-electrochemical activity volcanoes in Trilayer Graphene
Mohammad Babar, Ziyan Zhu, Rachel Kurchin +2
In this work, we develop a twist-dependent electrochemical activity map, combining a tight-binding electronic structure model with modified Marcus-Hush-Chidsey kinetics in trilayer…
Anomalous interfacial electron transfer kinetics in twisted trilayer graphene caused by layer-specific localization
Kaidi Zhang, Yun Yu, Stephen Carr +9
Interfacial electron-transfer (ET) reactions underpin the interconversion of electrical and chemical energy. Pioneering experiments showed that the ET rate depends on the Fermi Dir…
Local atomic stacking and symmetry in twisted graphene trilayers
Isaac M. Craig, Madeline Van Winkle, Catherine Groschner +7
Moiré superlattices formed from twisting trilayers of graphene are an ideal model for studying electronic correlation, and offer several advantages over bilayer analogues, includin…