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Tunable electrochemistry with moiré flat bands and topological defects at twisted bilayer graphene [article]

Yun Yu, Kaidi Zhang, Holden Parks, Mohammad Babar, Stephen Carr, Isabel Craig, Madeline Van Winkle, Artur Lyssenko, Takashi Taniguchi, Kenji Watanabe, Venkatasubramanian Viswanathan, D. Kwabena Bediako
2021 arXiv   pre-print
Tailoring electron transfer dynamics across solid-liquid interfaces is fundamental to the interconversion of electrical and chemical energy.  ...  This effect is driven by the angle-dependent tuning of moir\'e-derived flat bands that modulate electron transfer processes with the solution-phase redox couple.  ...  the material via dynamic electron/hole doping.  ... 
arXiv:2108.06826v1 fatcat:blkasl2nune4hda3627kaw2coa

"N" structure for type-II superlattice photodetectors

Omer Salihoglu, Abdullah Muti, Kutlu Kutluer, Tunay Tansel, Rasit Turan, Yuksel Ergun, Atilla Aydinli
2012 Applied Physics Letters  
Phys. 112, 083103 (2012) Long-wave infrared nBn photodetectors based on InAs/InAsSb type-II superlattices  ...  Lett. 101, 181108 (2012) Quantum mechanical simulation of graphene photodetectors J. Appl.  ...  photodetectors have received great interest in the development of short wave infrared (SWIR), midwave infrared (MWIR), and long wave infrared (LWIR) detectors due to advantages like band gap engineering  ... 
doi:10.1063/1.4745841 fatcat:gs3p5yd6wjcnpffk4nzhilidry

Modelling of graphene functionalization

Martin Pykal, Petr Jurečka, František Karlický, Michal Otyepka
2016 Physical Chemistry, Chemical Physics - PCCP  
This perspective describes the available theoretical methods and models for simulating graphene functionalization based on quantum and classical mechanics.  ...  layer of solvent molecules confined between two graphene sheets oriented in parallel.  ...  Phys., 2016, 18, 6351--6372 | 6361 Fig. 7 7 Screenshots from molecular dynamics simulations of various processes taking place on a graphene surface: graphene exfoliation (top left), nucleobase adsorption  ... 
doi:10.1039/c5cp03599f pmid:26323438 fatcat:2fxu4rtalzgp3jwn5uhnnaytku

Nanoscale thermal transport. II. 2003–2012

David G. Cahill, Paul V. Braun, Gang Chen, David R. Clarke, Shanhui Fan, Kenneth E. Goodson, Pawel Keblinski, William P. King, Gerald D. Mahan, Arun Majumdar, Humphrey J. Maris, Simon R. Phillpot (+2 others)
2014 Applied Physics Reviews  
spectrum of technology drivers such as improved thermal barriers, higher efficiency thermoelectric energy conversion, phase-change memory, heat-assisted magnetic recording, thermal management of nanoscale electronics  ...  Progress in the control of thermal transport at the nanoscale is critical to continued advances in the density of information that can be stored in phase change memory devices and new generations of magnetic  ...  In the metal, the only parameter is electron density, which determines the Fermi wave vector.  ... 
doi:10.1063/1.4832615 fatcat:odppii6lw5emppgoeqwloeltaq

Stochastic thermal transport of nanoparticle suspensions

Yimin Xuan, Qiang Li, Xing Zhang, Motoo Fujii
2006 Journal of Applied Physics  
spectrum of technology drivers such as improved thermal barriers, higher efficiency thermoelectric energy conversion, phase-change memory, heat-assisted magnetic recording, thermal management of nanoscale electronics  ...  Progress in the control of thermal transport at the nanoscale is critical to continued advances in the density of information that can be stored in phase change memory devices and new generations of magnetic  ...  In the metal, the only parameter is electron density, which determines the Fermi wave vector.  ... 
doi:10.1063/1.2245203 fatcat:m4mmodbcxbb5hk4nssymcxtl4e

Heat Transport Control and Thermal Characterization of Low-Dimensional Materials: A Review

Alexandros El Sachat, Francesc Alzina, Clivia M. Sotomayor Torres, Emigdio Chavez-Angel
2021 Nanomaterials  
We summarize the latest device-relevant methodologies of phonon engineering in semiconductor nanostructures and 2D materials, including graphene and transition metal dichalcogenides.  ...  to control heat propagation in nanomaterials.  ...  In these processes the temperature depends on the time scale of the measurement and the sensitivity of the sensor (thermometer), i.e., the study of dynamic effects in systems out of thermal equilibrium  ... 
doi:10.3390/nano11010175 pmid:33450930 fatcat:bvufumvhmrazxapavvktva6yem

New views of materials through aberration-corrected scanning transmission electron microscopy

S. J. Pennycook, M. Varela
2011 Microscopy  
Ikuhara Y (2010) Dynamics of annular bright field imaging in scanning transmission electron microscopy. Ultramicroscopy 110: 903-923.  ...  Ultramicroscopy 78: 1-11. 8 Dellby N, Krivanek O L, Nellist P D, Batson P E, and Lupini A R (2001) Progress in aberration-corrected scanning transmission electron microscopy.  ...  In the aberration-corrected microscope, we have a coherent spherical wave forming the probe, and we also have dynamical diffraction in the case of zone axis crystals.  ... 
doi:10.1093/jmicro/dfr030 pmid:21844591 fatcat:rblyicu6mvezlaquwobeujmauq

Terahertz response of patterned epitaxial graphene

Christian Sorger, Sascha Preu, Johannes Schmidt, Stephan Winnerl, Yuliy V Bludov, Nuno M R Peres, Mikhail I Vasilevskiy, Heiko B Weber
2015 New Journal of Physics  
The results are in excellent agreement with theoretical calculations based on the electronic energy spectrum of graphene and the electrodynamics of the patterned structure.  ...  The effect even increases up to 50% when removing graphene stripes in analogy to a wire grid polarizer.  ...  We acknowledge support from the EC under Graphene Flagship (contract no. CNECT-ICT-604391).  ... 
doi:10.1088/1367-2630/17/5/053045 fatcat:f7bcoqssj5drrpo5q5lztdjwsa

Exploring the Complex World of Two-Dimensional Ordering with Three Modes

S. K. Mkhonta, K. R. Elder, Zhi-Feng Huang
2013 Physical Review Letters  
In addition, non-equilibrium phase transitions are examined to illustrate the complex phase behavior described by the model.  ...  This model provides a systematic path to predict the influence of lattice symmetry on both structure and dynamics of crystalline and defected systems.  ...  A typical and well-known example is graphene, which exhibits exceptional electronic, mechanical and thermal properties [1, 2] .  ... 
doi:10.1103/physrevlett.111.035501 pmid:23909335 fatcat:kaabea5w55crfovrhptrgpbbzq

Creating and Steering Highly Directional Electron Beams in Graphene

Ming-Hao Liu, Cosimo Gorini, Klaus Richter
2017 Physical Review Letters  
We put forward a concept to create highly collimated, non-dispersive electron beams in pseudo-relativistic Dirac materials such as graphene or topological insulator surfaces.  ...  the intimate quantum-to-classical correspondence of these focused electron waves, we consider high-fidelity transverse magnetic focusing accompanied by simulations for current mapping through scanning  ...  In particular, the lack of a source or mechanism for providing narrow and well collimated beams still prevents graphene electron optics from fully taking advantage of its optics-like electronic characteristics  ... 
doi:10.1103/physrevlett.118.066801 pmid:28234513 fatcat:pp2beb3prbadxojyyzjjfmmcu4

Moiré and beyond in transition metal dichalcogenide twisted bilayers [article]

Kha Tran, Junho Choi, Akshay Singh
2020 arXiv   pre-print
In this review article, we focus on opto-electronic properties of excitons in twisted 2D transition metal dichalcogenide (TMD) semiconductor BL-HS.  ...  We look at existing evidence of moir\'e excitons in localized and strongly correlated states, and at nanoscale mapping of moir\'e superlattice and lattice-reconstruction.  ...  In parallel, there is an increased focus on integration of advanced 2D nanomaterials in traditional electronic circuits, and to understand and control electronic and thermal transport.  ... 
arXiv:2008.07086v1 fatcat:zret2hqkbjfqpe5nreundykawy

Two-Dimensional Thermal Transport in Graphene: A Review of Numerical Modeling Studies

Yan Wang, Ajit K. Vallabhaneni, Bo Qiu, Xiulin Ruan
2014 Nanoscale and Microscale Thermophysical Engineering  
This article reviews recent numerical studies of thermal transport in graphene, with a focus on molecular dynamics simulation, the atomistic Green's function method, and the phonon Boltzmann transport  ...  We also highlight the insights from numerical studies aimed at bridging the gaps between 1D, 2D, and 3D thermal transport in carbon nanotubes/graphene nanoribbons, graphene, and graphite.  ...  NUMERICAL METHODS FOR THERMAL TRANSPORT In this section, we review a few numerical methods for modeling thermal transport in graphene, in particular, classical molecular dynamics (MD) simulations, the  ... 
doi:10.1080/15567265.2014.891680 fatcat:q4qg2u36ijcxpaaly4d7dslooy

Engineering interfacial quantum states and electronic landscapes by molecular nanoarchitectures [article]

Ignacio Piquero-Zulaica, Jorge Lobo-Checa, Zakaria M. Abd El-Fattah, J. Enrique Ortega, Florian Klappenberger, Willi Auwärter, Johannes V. Barth
2021 arXiv   pre-print
Both atomic manipulation and supramolecular principles provide access to custom-designed molecular superlattices, which tailor the surface electronic landscape and influence fundamental chemical and physical  ...  They provide versatile supports for functional nanostructures and mediate essential physicochemical processes.  ...  At 40 K, the diffusion of the CO molecules is restricted to a single pore and dynamic processes confirm their repulsive character [74] .  ... 
arXiv:2107.10141v1 fatcat:vqombkv4lnggvbvsnshlobolya

Science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems

Andrea C Ferrari, Francesco Bonaccorso, Vladimir Fal'ko, Konstantin S Novoselov, Stephan Roche, Peter Bøggild, Stefano Borini, Frank H L Koppens, Vincenzo Palermo, Nicola Pugno, José A Garrido, Roman Sordan (+52 others)
2015 Nanoscale  
We present the science and technology roadmap for graphene, related two-dimensional crystals, and hybrid systems, targeting an evolution in technology, that might lead to impacts and benefits reaching  ...  We provide an overview of the key aspects of graphene and related materials (GRMs), ranging from fundamental research challenges to a variety of applications in a large number of sectors, highlighting  ...  Vienna Ab initio Simulation Package (VASP): 476 a plane-wave all-electron code using the projector-augmented wave method to describe the electron-core interaction.  ... 
doi:10.1039/c4nr01600a pmid:25707682 fatcat:hzfkhollfbbunbdroujkvqzxke

Morphing Graphene-Based Systems for Applications: Perspectives from Simulations [chapter]

T. Cavallucci, K. Kakhiani, R. Farchioni, V. Tozzini
2017 GraphITA  
band gap to use it in electronics, or to create 3D frameworks for volumetric applications.  ...  Graphene, the one-atom-thick sp 2 -hybridized carbon crystal, displays unique electronic, structural and mechanical properties, which promise a large number of interesting applications in diverse high-tech  ...  Acknowledgements We gratefully acknowledge financial support by funding from the European Union's Horizon 2020: the Marie Sklodowska-Curie grant agreement No 657070 and the graphene Core 1, Grant Agreement  ... 
doi:10.1007/978-3-319-58134-7_7 fatcat:jue3ph5wrjh4tfudxjz67jjnl4
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