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Recent discoveries on Mott insulating and unconventional superconducting states in twisted bilayer graphene with Moir\'e superlattices have reshaped the landscape of ''twistronics'' and paved the way for developing high-temperature…

Applied Physics · Physics 2023-12-13 Mourad Oudich , Xianghong Kong , Tan Zhang , Chengwei Qiu , Yun Jing

A theory is presented for the strong enhancement of graphene-on-substrate bandgaps by attractive interactions mediated through phonons in a polarizable superstrate. It is demonstrated that gaps of up to 1eV can be formed for experimentally…

Strongly Correlated Electrons · Physics 2012-04-25 J. P. Hague

In this Letter, we present experimental findings on electron-electron scattering in a two-dimensional moir'e heterostructure with tunable Fermi wave vector, reciprocal lattice vector, and band gap. We achieve this in high-mobility aligned…

Monolayer graphene exhibits many spectacular electronic properties, with superconductivity being arguably the most notable exception. It was theoretically proposed that superconductivity might be induced by enhancing the electron-phonon…

First-principles calculations can accurately describe electron-phonon (e-ph) interactions and electronic transport in a wide range of materials, but are currently limited to unit cells with up to $\sim$100 atoms due to computational cost.…

Materials Science · Physics 2026-03-17 David J. Abramovitch , Marco Bernardi

We present a tunable microwave scattering device that allows the controlled variation of Fano line shape parameters in transmission through quantum billiards. Transport in this device is nearly fully coherent. By comparison with quantum…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 S. Rotter , F. Libisch , J. Burgdörfer , U. Kuhl , H. -J. Stöckmann

Near a magic twist angle, bilayer graphene transforms from a weakly correlated Fermi liquid to a strongly correlated two-dimensional electron system with properties that are extraordinarily sensitive to carrier density and to controllable…

Mesoscale and Nanoscale Physics · Physics 2020-12-14 Eva Y. Andrei , Allan H. MacDonald

We review the different results obtained in the last decade in the field of Raman scattering of graphene based systems, with an applied magnetic field. Electronic properties of graphene based systems with an applied magnetic field will…

Mesoscale and Nanoscale Physics · Physics 2018-02-14 C. Faugeras , M. Orlita , M. Potemski

We investigate the electronic and magnetic properties of graphene channels ($2$--$4$~nm wide) embedded within fluorographene, focusing on two distinct interfaces: the fully fluorinated $\alpha$ interface and the half-fluorinated $\beta$…

Mesoscale and Nanoscale Physics · Physics 2024-10-01 R. M. Guzmán-Arellano , A. D. Hernández-Nieves , F. M. Peeters , Gonzalo Usaj

The recently observed unconventional ferroelectricity in AB bilayer graphene sandwiched by hexagonal Boron Nitride (hBN) presents a new platform to manipulate correlated phases in multilayered van der Waals heterostructures. We present a…

Mesoscale and Nanoscale Physics · Physics 2022-11-30 Ziyan Zhu , Stephen Carr , Qiong Ma , Efthimios Kaxiras

Controlled modification of graphene properties is essential for its proposed electronic applications. Here we describe a possibility of tuning electrical properties of graphene via electron beam irradiation. We show that by controlling the…

Materials Science · Physics 2015-10-28 G. Liu , D. Teweldebrhan , A. A. Balandin

Coupled nanomechanical resonators are interesting for both fundamental studies and practical applications as they offer rich and tunable oscillation dynamics. At present, the mechanical coupling in such systems is often mediated by a fixed…

Mesoscale and Nanoscale Physics · Physics 2020-11-10 G. J. Verbiest , M. Goldsche , J. Sonntag , T. Khodkov , N. von den Driesch , D. Buca , C. Stampfer

Imprinting magnetism into graphene makes an important step to its applications in spintronics. An actively explored approach is proximity coupling of graphene to a 2D magnet. In these endeavors, the use of epitaxial graphene may bring…

We report the discovery of a strong and tunable spin lifetime anisotropy with excellent spin lifetimes up to 7.8 ns in dual-gated bilayer graphene. Remarkably, this realizes the manipulation of spins in graphene by electrically-controlled…

Mesoscale and Nanoscale Physics · Physics 2018-09-26 Jinsong Xu , Tiancong Zhu , Yunqiu Kelly Luo , Yuan-Ming Lu , Roland K. Kawakami

Since their discovery, graphene-based systems represent an exceptional playground to explore the emergence of peculiar quantum effects. The present paper focuses on the anomalous appearence of strong infrared phonon resonances in the…

Mesoscale and Nanoscale Physics · Physics 2012-10-04 E. Cappelluti , L. Benfatto , M. Manzardo , A. B. Kuzmenko

Thanks to the recent discovery on the magic-angle bilayer graphene, twistronics is quickly becom11 ing a burgeoning field in condensed matter physics. This letter expands the realm of twistronics to acoustics by introducing twisted bilayer…

Mesoscale and Nanoscale Physics · Physics 2020-11-25 Yuanchen Deng , Mourad Oudich , Nikhil JRK Gerard , Jun Ji , Minghui Lu , Yun Jing

\textit{Ab initio} calculations within the density functional theory formalism are performed to investigate the stability and electronic properties of fluorinated bilayer graphene (bilayer fluorographene). A comparison is made to previously…

Materials Science · Physics 2013-01-25 Jozef Sivek , Ortwin Leenaerts , Bart Partoens , Francois Peeters

We predict that graphene is a unique system where disorder-assisted scattering (supercollisions) dominates electron-lattice cooling over a wide range of temperatures, up to room temperature. This is so because for momentum-conserving…

Mesoscale and Nanoscale Physics · Physics 2012-09-21 Justin C. W. Song , Michael Y. Reizer , Leonid S. Levitov

Twisted bilayer graphene (tBLG) has recently emerged as a platform for hosting correlated phenomena, owing to the exceptionally flat band dispersion that results near interlayer twist angle $\theta\approx1.1^\circ$. At low temperature a…

Strongly Correlated Electrons · Physics 2019-10-03 H. Polshyn , M. Yankowitz , S. Chen , Y. Zhang , K. Watanabe , T. Taniguchi , C. R. Dean , A. F. Young

In heterostructures consisting of atomically thin crystals layered on top of one another, lattice mismatch or rotation between the layers results in long-wavelength moir\'e superlattices. These moir\'e patterns can drive significant band…

Mesoscale and Nanoscale Physics · Physics 2019-10-01 Nathan R. Finney , Matthew Yankowitz , Lithurshanaa Muraleetharan , K. Watanabe , T. Taniguchi , Cory R. Dean , James Hone