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All-carbon heterostructures have been produced recently via focused ion beam patterning of single layer graphene. Amorphized graphene is similar to a graphene sheet in which some hexagons are replaced by a combination of pentagonal,…

材料科学 · 物理学 2017-04-07 B Mortazavi , Z Fan , LFC Pereira , A Harju , T Rabczuk

This paper concerns splitting-based iterative procedures for the coupled nonlinear thermo-poroelasticity model problem. The thermo-poroelastic model problem we consider is formulated as a three-field system of PDE's, consisting of an energy…

This work presents a mathematical model of an adsorption column to study the evolution of contaminant concentration and adsorbed quantity along the longitudinal axis of the filter. The model is formulated as a system of partial differential…

数学物理 · 物理学 2026-04-09 J. Anglada Lloveras , M. Aguareles , E. Barrabés

An increasing number of papers propose routes to implement thermal counterparts of electronic rectification. These schemes are mainly based on combinations of crystal anharmonicity and broken mirror symmetry. With respect to graphene,…

介观与纳米尺度物理 · 物理学 2025-01-13 Daryoush Shiri , Andreas Isacsson

We establish the long-time existence of large-data weak solutions to a system of nonlinear partial differential equations. The system of interest governs the motion of non-Newtonian fluids described by a simplified viscoelastic rate-type…

偏微分方程分析 · 数学 2017-10-02 Miroslav Bulíček , Josef Málek , Vít Průša , Endre Süli

We consider a simple spin-membrane model for rippling in graphene. The model exhibits transitions from a flat but rippled membrane to a buckled one. At high temperature the transition is second order but it is first order at low temperature…

介观与纳米尺度物理 · 物理学 2016-11-09 Miguel Ruiz-Garcia , Luis L. Bonilla , Antonio Prados

The amount of rippling in graphene sheets is related to the interactions with the substrate or with the suspending structure. Here, we report on an irreversibility in the response to forces that act on suspended graphene sheets. This may…

介观与纳米尺度物理 · 物理学 2015-05-19 N. Abedpour , Reza Asgari , M. R. Rahim Tabar

Graphene has opened new avenues of research in quantum transport, with potential applications for coherent electronics. Coherent transport depends sensitively on scattering from microscopic disorder present in graphene samples: electron…

介观与纳米尺度物理 · 物理学 2015-05-18 Jesse Berezovsky , Robert M Westervelt

We study a non-linear and non-local evolution equation for curves obtained as the sharp interface limit of a phase-field model for crawling motion of eukaryotic cells on a substrate. We establish uniqueness of solutions to the sharp…

偏微分方程分析 · 数学 2017-03-03 Matthew S. Mizuhara , Peng Zhang

We establish the existence of quasi-periodic traveling wave solutions for the $\beta$-plane equation on $\mathbb{T}^2$ with a large quasi-periodic traveling wave external force. These solutions exhibit large sizes, which depend on the…

偏微分方程分析 · 数学 2024-06-12 Roberta Bianchini , Luca Franzoi , Riccardo Montalto , Shulamit Terracina

From a mathematical perspective, the extraordinary properties of metamaterials are often reflected in the coefficients of the governing partial differential equations (PDEs). These coefficients may fall outside the assumptions of classical…

数值分析 · 数学 2026-05-22 Eric T. Chung , Patrick Ciarlet , Xingguang Jin , Changqing Ye

The ability to effectively guide electromagnetic radiation below the diffraction limit is of the utmost importance in the prospect of all-optical plasmonic circuitry. Here, we propose an alternative solution to conventional metal-based…

介观与纳米尺度物理 · 物理学 2016-11-28 P. A. D. Gonçalves , E. J. C. Dias , Sanshui Xiao , M. I. Vasilevskiy , N. Asger Mortensen , N. M. R. Peres

We demonstrate in this work, that expanded graphite (EG) can lead to a very large enhancement in thermal conductivity of polyetherimide-graphene and epoxy-graphene nanocomposites prepared via solvent casting technique. A k value of 6.56…

材料科学 · 物理学 2022-03-15 Fatema Tarannum , Swapneel Danayat , Avinash Nayal , Rajmohan Muthaiah , Jivtesh Garg

We use non-perturbative renormalization group techniques to calculate the momentum dependence of thermal fluctuations of graphene, based on a self-consistent calculation of the momentum dependent elastic constants of a tethered membrane. We…

软凝聚态物质 · 物理学 2010-07-13 F. L. Braghin , N. Hasselmann

The paper studies a finite element method for computing transport and diffusion along evolving surfaces. The method does not require a parametrization of a surface or an extension of a PDE from a surface into a bulk outer domain. The…

数值分析 · 数学 2014-03-04 Joerg Grande , Maxim Olshanskii , Arnold Reusken

Motivated by the viewpoint of integrable systems, we study commuting flows of 2-component quasilinear equations, reducing to investigate the solutions of the wave equation with non-constant speed. In this paper, we apply the reduction…

数学物理 · 物理学 2023-12-15 Natale Manganaro , Alessandra Rizzo , Pierandrea Vergallo

Using transient absorption (TA) microscopy as a hot electron thermometer we show disorder-assisted acoustic-phonon supercollisions (SCs) best describes the rate-limiting relaxation step in graphene over a wide range of lattice temperatures…

材料科学 · 物理学 2013-10-25 Matt W. Graham , Su-Fei Shi , Zenghui Wang , Daniel C. Ralph , Jiwoong Park , Paul L. McEuen

The realization of optoelectronic devices on paper has been an outstanding challenge due to the large surface roughness and incompatible nature of paper with optical materials. Here, we demonstrate a new class of optoelectronic devices on a…

We investigate the propagation of wave-packets on graphene in a perpendicular magnetic field and the appearance of collapses and revivals in the time-evolution of an initially localised wave-packet. The wave-packet evolution in graphene…

介观与纳米尺度物理 · 物理学 2009-09-22 Viktor Krueckl , Tobias Kramer

Transient cooling phenomenon in two-dimensional materials is studied based on the phonon Boltzmann transport equation (BTE). Using a heating laser pulse to heat the two-dimensional disk geometry under the environment temperature, after the…

介观与纳米尺度物理 · 物理学 2024-10-10 Chuang Zhang , Lei Wu