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Narrow gaps are formed in suspended single to few layer graphene devices using a pulsed electrical breakdown technique. The conductance of the resulting devices can be programmed by the application of voltage pulses, with a voltage of…

Mesoscale and Nanoscale Physics · Physics 2015-06-05 Hang Zhang , Wenzhong Bao , Zeng Zhao , Jhao-Wun Huang , Brian Standley , Gang Liu , Fenglin Wang , Philip Kratz , Lei Jing , Marc Bockrath , Chun Ning Lau

Graphene/AlGaN/GaN heterostructures are proposed to investigate the drag and two-stream instability effects. In this study, graphene grown by chemical vapor deposition was transferred from copper onto the top of the standard AlGaN/GaN…

Mesoscale and Nanoscale Physics · Physics 2026-01-27 A. Rehman , D. B. But , P. Sai , M. Dub , P. Prystawko , A. Krajewska , G. Cywinski , W. Knap , S. Rumyantsev

We investigate experimentally the role of spatial coherence on optical beam shifts. This topic has been the subject of recent theoretical debate. We consider Gaussian Schell-model beams, with different spatial degrees of coherence,…

Optics · Physics 2015-06-05 Michele Merano , Gabriele Umbriaco , Giampaolo Mistura

Graphene, due to its unique electronic structure favoring high carrier mobility, is considered a promising material for use in high-speed electronic devices in the post-silicon electronic era. For this reason, experimental research on…

Mesoscale and Nanoscale Physics · Physics 2020-09-17 Giovanni Spinelli , Patrizia Lamberti , Vincenzo Tucci , Francisco Pasadas , David Jiménez

We present a theoretical framework for nonlinear optics of graphene and other 2D materials in layered structures. We derive a key equation to find the effective electric field and the sheet current density in the 2D material for given…

Optics · Physics 2018-12-27 J. L. Cheng , J. E. Sipe , N. Vermeulen , C. Guo

Graphene-metal interface as one of the interesting graphene-based objects attracts much attention from both application and fundamental science points of view. This paper gives a timely review of the recent experimental works on the growth…

Materials Science · Physics 2015-07-10 Yuriy Dedkov , Elena Voloshina

We investigate electronic transport in lithographically patterned graphene ribbon structures where the lateral confinement of charge carriers creates an energy gap near the charge neutrality point. Individual graphene layers are contacted…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 Melinda Y. Han , Barbaros Oezyilmaz , Yuanbo Zhang , Philip Kim

We present a unique experimental configuration that allows us to determine the interfacial forces on nearly parallel plates made from the thinnest possible mechanical structures, single and few layer graphene membranes. Our approach…

Dirac-electronic tunneling and nonlinear transport properties with both finite and zero energy bandgap are investigated for graphene with a tilted potential barrier under a bias. For validation, results from a finite-difference based…

Mesoscale and Nanoscale Physics · Physics 2020-04-01 Farhana Anwar , Andrii Iurov , Danhong Huang , Godfrey Gumbs , Ashwani Sharma

Graphene is a single layer of carbon atoms arranged in a honeycomb lattice with remarkable mechanical, electrical and optical properties. For the first time graphene layers suspended on copper meshes were installed into a gas detector…

We propose a mechanism to control the interaction between adsorbates on graphene. The interaction between a pair of adsorbates---the change in adsorption energy of one adsorbate in the presence of another---is dominated by the interaction…

Mesoscale and Nanoscale Physics · Physics 2013-09-13 Dmitry Solenov , Chad Junkermeier , Thomas L. Reinecke , Kirill A. Velizhanin

Based on a Dirac-like Hamiltonian and coherent scattering formalism, we study spin-valley transport and Goos-H\"{a}nchen like (GHL) effect of transmitted and reflected electrons in a gated monolayer WS$_2$. Our results show that the lateral…

Mesoscale and Nanoscale Physics · Physics 2017-02-10 Hassan Ghadiri , Alireza Saffarzadeh

Computer simulations are employed to investigate the adsorption mechanisms of ethane on both homogeneous and inhomogeneous substrates. For homogeneous surfaces, the full range of surface phase transitions - from incomplete to complete…

Soft Condensed Matter · Physics 2026-04-01 Ł. Baran , D. Tarasewicz , W. Rżysko

In this work, we summarize the current state of understanding of lateral displacement and angular deviations of an optical beam propagating through dielectric blocks. In part I, the analytical formulas, found for critical incidence, are…

Optics · Physics 2019-12-19 Steafno De Leo , Gabriel G. Maia

We study a transmission coefficient of graphene nanoribbons with a top gate which acts as an oblique barrier. Using a Green function method based on the Dirac-like equation, scattering among transverse modes due to the oblique barrier is…

Quantum Physics · Physics 2018-02-14 J. H. Oh , D. Ahn

Chiral tunneling through a harmonically driven potential barrier in graphene monolayer is considered in this work. Since the quasiparticles in this system are chiral in nature, tunneling is highly anisotropic, we determine the transmission…

Mesoscale and Nanoscale Physics · Physics 2008-08-23 M. Ahsan Zeb , K. Sabeeh , M. Tahir

Theoretical studies have shown that electron-electron (e-e) and electron-hole (e-h) interactions play important roles in many observed quantum properties of graphene making this an ideal system to study many body effects. In this report we…

Mesoscale and Nanoscale Physics · Physics 2014-12-10 Pranjal Kumar Gogoi , Iman Santoso , Surajit Saha , Sihao Wang , Antonio H. Castro Neto , Kian Ping Loh , T. Venkatesan , Andrivo Rusydi

We perform a comprehensive analysis of the spectrum of graphene plasmons which arise when a pair of sheets are confined between conducting materials. The associated enhanced local fields may be employed in the manipulation of light on the…

Mesoscale and Nanoscale Physics · Physics 2017-09-05 Godfrey Gumbs , Dipendra Dahal , Antonios Balassis

Diffusion and drift of a graphene flake on a graphite surface are analyzed. A potential energy relief of the graphene flake is computed using ab initio and empirical calculations. Based on the analysis of this relief, different mechanisms…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 Irina V. Lebedeva , Andrey A. Knizhnik , Andrey M. Popov , Olga V. Ershova , Yurii E. Lozovik , Boris V. Potapkin

A tunable graphene-based reflective cell operating at THz is proposed for use in reconfigurable-beam reflectarrays, or similarly to implement the so-called generalized law of reflection. The change in the complex conductivity of graphene…