141 citations · 323 across the 23 of their papers we have counts for
23 papers
Twist and strain identification in moiré heterostructures
Zhen Zhan, Federico Escudero, Dong Wang +4
The geometrical and electronic properties of moiré materials are highly sensitive to the twist and strain in the samples due to the moiré magnifying effect. Accurate identification…
Revealing quantum geometry effects in magic angle twisted bilayer graphene using the circular photogalvanic effect
Eylon Persky, Leonie Parisot, Minhao He +7
Magic-angle twisted bilayer graphene (MATBG) hosts flat bands whose correlated and topological phases depend sensitively on the electronic point-group symmetry, which is set by the…
Structural and electronic signatures of strain-tunable marginally twisted bilayer graphene
Pei Ouyang, Jiawei Yu, Qian Li +11
Marginally twisted bilayer graphene having small twist angles is predicted to exhibit unique structural and electronic properties, though experimental characterization remains limi…
Straintronics and twistronics in bilayer graphene
Federico Escudero, Dong Wang, Pierre A. Pantaleón +3
The interplay of twist and strain in bilayer graphene enables the formation of moiré patterns and narrow bands that host correlated and topological phases. While magic-angle twiste…
Review of the tight-binding method applicable to the properties of moiré superlattices
Xueheng Kuang, Federico Escudero, Pierre A. Pantaleón +2
Moiré superlattices have emerged as a versatile platform for exploring a wide range of ex- otic quantum phenomena. Unlike angstrom-scale materials, the moiré length-scale system co…
Twistraintronics in Square Moire Superlattices of Stacked Graphene Layers
Roberto Carrasco, Federico Escudero, Zhen Zhan +6
We report the first observation of controlled, strain-induced square moire patterns in stacked graphene. By selectively displacing native wrinkles, we drive a reversible transition…
Geometrical properties of strained and twisted moiré heterostructures
Federico Escudero, Francisco Guinea, Zhen Zhan
The experimental observations of many interaction-driven electronic phases in moiré superlattices have stimulated intense theoretical and experimental efforts to understand and eng…
Moiré Collapse and Luttinger Liquids In Twisted Anisotropic Homobilayers
D. J. P. de Sousa, Seungjun Lee, Francisco Guinea +1
We introduce twisted anisotropic homobilayers as a distinct class of moiré systems, characterized by a distinctive ``magic angle", , where both the moiré unit cell and Brillou…
Measuring Phonon Dispersion and Electron-Phason Coupling in Twisted Bilayer Graphene with a Cryogenic Quantum Twisting Microscope
John Birkbeck, Jiewen Xiao, Alon Inbar +7
The coupling between electrons and phonons is one of the fundamental interactions in solids, underpinning a wide range of phenomena such as resistivity, heat conductivity, and supe…
Theory of phonon spectroscopy with the quantum twisting microscope
Jiewen Xiao, Erez Berg, Leonid I. Glazman +3
We develop a theory of probing phonon modes of van-der-Waals materials using the quantum twisting microscope. While elastic tunneling dominates the tunneling current at small twist…
Optical Absorption and Emission from Wannier-Stark Spectra of Moiré Superlattices
Vo Tien Phong, Francisco Guinea, Cyprian Lewandowski
Using a formalism based on the non-Abelian Berry connection, we explore quantum geometric signatures of Wannier-Stark spectra in two-dimensional superlattices. The Stark energy can…
Strain and twist angle driven electronic structure evolution in twisted bilayer graphene
Jiawei Yu, Guihao Jia, Qian Li +14
In twisted bilayer graphene (TBG) devices, local strains frequently coexist and intertwine with the twist-angle-dependent moiré superlattice, significantly influencing the electron…
Terahertz photocurrent probe of quantum geometry and interactions in magic-angle twisted bilayer graphene
Roshan Krishna Kumar, Geng Li, Riccardo Bertini +24
Moiré materials represent strongly interacting electron systems bridging topological and correlated physics. Despite significant advances, decoding wavefunction properties underlyi…
Flat bands in chiral multilayer graphene
Roi Makov, Francisco Guinea, Ady Stern
We study the formation and properties of perfectly-flat zero energy bands in a multi-layer graphene systems in the chiral limit. Employing the degrees of freedoms of the multi-laye…
Infrared Spectroscopy for Diagnosing Superlattice Minibands in Magic-angle Twisted Bilayer Graphene
Geng Li, Roshan Krishna Kumar, Petr Stepanov +11
Twisted bilayer graphene (TBG) represents a highly tunable, strongly correlated electron system owed to its unique flat electronic bands. However, understanding the single-particle…
Optical properties and plasmons in moiré structures
Xueheng Kuang, Pierre A. Pantaleón Peralta, Jose Angel Silva-Guillén +3
The discoveries of numerous exciting phenomena in twisted bilayer graphene (TBG) are stimulating significant investigations on moiré structures that possess a tunable moiré potenti…
Robust flat bands in twisted trilayer graphene quasicrystals
Chen-Yue Hao, Zhen Zhan, Pierre A. Pantaleón +6
Moiré structures formed by twisting three layers of graphene with two independent twist angles present an ideal platform for studying correlated quantum phenomena, as an infinite s…
High-mobility compensated semimetals, orbital magnetization, and umklapp scattering in bilayer graphene moire superlattices
A. L. Shilov, M. A. Kashchenko, P. A. Pantaleón +10
Twist-controlled moire superlattices (MS) have emerged as a versatile platform in which to realize artificial systems with complex electronic spectra. Bernal-stacked bilayer graphe…
Designing Moire Patterns by Shearing
Pierre A. Pantaleon, Hector Sainz-Cruz, Francisco Guinea
We analyze the elastic properties, structural effects, and low-energy physics of a sheared nanoribbon placed on top of graphene, which creates a gradually changing moire pattern. B…
Flat band localization in twisted bilayer graphene nanoribbons
Elias Andrade, Pierre A. Pantaleón, Francisco Guinea +1
We analyze the electronic structure of twisted bilayer graphene (TBG) nanoribbons close to the magic angle. We describe a transition from an incomplete to a complete moiré structur…
Designing Moiré Patterns by Strain
Federico Escudero, Andreas Sinner, Zhen Zhan +2
Experiments conducted on two-dimensional twisted materials have revealed a plethora of moiré patterns with different forms and shapes. The formation of these patterns is usually at…
Effect of Point Defects on the Optical and Transport Properties of MoS2 and WS2
S. Yuan, R. Roldán, M. I. Katsnelson +1
Imperfections in the crystal structure, such as point defects, can strongly modify the optical and transport properties of materials. Here, we study the effect of point defects on…
Strains and pseudo-magnetic fields in circular graphene rings
Nima Abedpour, Reza Asgari, F. Guinea
We demonstrate that circular graphene ring under a shear stress displays strong pseudo-magnetic fields. We calculate the pseudo-magnetic field both from continuum elasticity theory…