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The experimental control over the twist angle in twisted bilayer graphene has not been reported and its realistic structure is most likely incommensurate. In this paper, we develop a tight-binding virtual crystal approximation theory to…

介观与纳米尺度物理 · 物理学 2015-01-27 D. Ghader , D. Szczȩśniak , A. Khater

Free-standing carbon nanomembranes (CNM) with molecular thickness and macroscopic size are fascinating objects both for fundamental reasons and for applications in nanotechnology. Although being made from simple and identical precursors…

材料科学 · 物理学 2014-09-17 A. Mrugalla , J. Schnack

The lattice dynamics of low-frequency rigid-plane modes in metallic (graphene multilayers, GML) and in insulating (hexagonal boron-nitride multilayers, BNML) layered crystals is investigated. The frequencies of shearing and compression…

材料科学 · 物理学 2012-08-17 K. H. Michel , B. Verberck

Van der Waals (vdW) heterostructures, which are produced by the precise assemblies of varieties of two-dimensional (2D) materials, have demonstrated many novel properties and functionalities. Here we report a nano-plasmonic study of vdW…

介观与纳米尺度物理 · 物理学 2023-01-30 Fengrui Hu , Minsung Kim , Y. Zhang , Yilong Luan , Kai-Ming Ho , Yi Shi , Cai-Zhuang Wang , Xinran Wang , Zhe Fei

The method of molecular dynamics and molecular mechanics has been used to numerically simulate the formation of wrinkle systems during compression of a graphene sheet lying on a flat solid substrate. It is shown that under uniaxial…

介观与纳米尺度物理 · 物理学 2024-12-13 Alexander V. Savin , Artem P. Klinov

Gas molecules trapped between graphene and various substrates in the form of bubbles are observed experimentally. The study of these bubbles is useful in determining the elastic and mechanical properties of graphene, adhesion energy between…

材料科学 · 物理学 2017-04-05 Sandeep K. Jain , Vladimir Juricic , Gerard T. Barkema

We apply the well-established theoretical method developed for geometrical nonlinearities of micro/nano-mechanical clamped beams to circular drums. The calculation is performed under the same hypotheses, the extra difficulty being to…

介观与纳米尺度物理 · 物理学 2020-09-25 D. Cattiaux , S. Kumar , X. Zhou , A. Fefferman , E. Collin

Adhesive interactions between elastic structures such as graphene sheets, carbon nanotubes, and microtubules have been shown to exhibit hysteresis due to irrecoverable energy loss associated with bond breakage, even in static…

生物物理 · 物理学 2021-02-02 Edvin Memet , Feodor Hilitski , Zvonimir Dogic , L. Mahadevan

As a two-dimensional material, graphene can be naturally obtained via epitaxial growth on a suitable substrate. Growth condition optimization usually requires an atomistic level understanding of the growth mechanism. In this article, we…

材料科学 · 物理学 2012-04-06 Ping Wu , Huijun Jiang , Wenhua Zhang , Zhenyu Li , Zhonghuai Hou , Jinlong Yang

The graphene membrane irradiated by weak activating alternative electric field in terahertz range was considered. The quantum approach based on the time-dependent density matrix method was used. The exact solution was obtained for graphene…

介观与纳米尺度物理 · 物理学 2015-11-18 N. E. Firsova , Yu. A. Firsov

The electronic transport properties of graphene-based superlattice structures are investigated. A graphene-based modulation-doped superlattice structure geometry is proposed and consist of periodically arranged alternate layers:…

介观与纳米尺度物理 · 物理学 2013-11-25 Dima Bolmatov , Chung-Yu Mou

Theoretical progress in graphene physics has largely relied on the application of a simple nearest-neighbor tight-binding model capable of predicting many of the electronic properties of this material. However, important features that…

介观与纳米尺度物理 · 物理学 2019-04-03 Z. M. Abd El-Fattah , M. A. Kher-Elden , I. Piquero-Zulaica , F. J. Garcia de Abajo , J. E. Ortega

One of the most interesting aspects of graphene is the tied relation between structural and electronic properties. The observation of ripples in the graphene samples both free standing and on a substrate has given rise to a very active…

其他凝聚态物理 · 物理学 2012-03-22 Fernando de Juan , Alberto Cortijo , María A. H. Vozmediano , Andrés Cano

A recent experimental study showed that an induced folded flap of graphene can spontaneously drive itself its tearing and peeling off a substrate, thus producing long, micrometer sized, regular trapezoidal-shaped folded graphene…

材料科学 · 物理学 2018-08-28 Alexandre F. Fonseca , Douglas S. Galvao

Nonlinear optical processes rely on the intrinsically weak interactions between photons enabled by their coupling with matter. Unfortunately, many applications in nonlinear optics are severely hindered by the small response of conventional…

材料科学 · 物理学 2014-12-15 Joel D. Cox , F. J. Garcia de Abajo

We describe the lattice deformation in graphene under strain effect by considering the spacial-momenta coordinates do not commute. This later can be realized by introducing the star product to end up with a generalized Heisenberg algebra.…

介观与纳米尺度物理 · 物理学 2020-12-02 Ahmed Jellal

Piezoelectric elastic metamaterials offer the ability to overcome the fixed, narrow bandwidth characteristics of passive elastic metamaterials. Interesting ultrasonic band gaps exist in piezoelectric plate metamaterials with periodic…

应用物理 · 物理学 2022-07-19 David R. Schipf , Matthew D. Guild , Caleb F. Sieck

Graphene on $L1_0$-FePd(001), which has been experimentally studied in recent years, is a heterogeneous interface with a significant lattice symmetry mismatch between the honeycomb structure of graphene and tetragonal alloy surface. In this…

材料科学 · 物理学 2022-09-14 Mitsuharu Uemoto , Hayato Adachi , Hiroshi Naganuma , Tomoya Ono

The limits of reversible deformation in graphene under various loadings are examined using lattice-dynamical stability analysis. This information is then used to construct a comprehensive lattice-stability limit surface for graphene, which…

材料科学 · 物理学 2015-09-21 Sandeep Kumar , David Parks

Graphene nanoribbon folds with single and double closed edges are studied using density functional theory methods. Van der Waals dispersive interactions are included via semi-empirical pairwise optimized potential. The geometrical phases of…

材料科学 · 物理学 2013-05-09 Nam B. Le , Lilia M. Woods