Results 31 to 40 of about 828,735 (332)

RKKY interaction in gapped or doped graphene

open access: yes, 2012
In our previous work (E. Kogan, Phys. Rev. B {\bf 84}, 115119 (2011)) we calculated RKKY interaction between two magnetic impurities in pristine graphene using the Green's functions (GF) in the coordinate -- imaginary time representation.
Kogan, E.
core   +1 more source

Synthesis of Graphene on Gold [PDF]

open access: yes, 2011
Here we report chemical vapor deposition of graphene on gold surface at ambient pressure. We studied effects of the growth temperature, pressure and cooling process on the grown graphene layers. The Raman spectroscopy of the samples reveals the essential
Coskun Kocabas   +6 more
core   +2 more sources

Next-nearest-neighbor Tight-binding Model of Plasmons in Graphene

open access: yes, 2013
In this paper we investigate the influence of the next-nearest-neighbor coupling of tight-binding model of graphene on the spectrum of plasmon excitations.
Kadirko, V., Kogan, E., Ziegler, K.
core   +1 more source

Electrical and photo-electrical properties of MoS2 nanosheets with and without an Al2O3 capping layer under various environmental conditions

open access: yesScience and Technology of Advanced Materials, 2016
The electrical and photo-electrical properties of exfoliated MoS2 were investigated in the dark and in the presence of deep ultraviolet (DUV) light under various environmental conditions (vacuum, N2 gas, air, and O2 gas).
Muhammad Farooq Khan   +3 more
doaj   +1 more source

High-throughput production of cheap mineral-based two-dimensional electrocatalysts for high-current-density hydrogen evolution

open access: yesNature Communications, 2020
The large-scale implementation of electrochemical technologies will require the high-throughput production of high-performance, inexpensive catalysts.
Chi Zhang   +8 more
doaj   +1 more source

Symmetry classification of energy bands in graphene and silicene

open access: yes, 2012
We present the results of the symmetry classification of the electron energy bands in graphene and silicene using group theory algebra and the tight--binding approximation.
Kogan, E.
core   +1 more source

General Scattering Mechanism and Transport in Graphene

open access: yes, 2011
Using quasi-time dependent semi-classical transport theory in RTA, we obtained coupled current equations in the presence of time varying field and based on general scattering mechanism $\tau \propto \mathcal{E}^{\beta}$.
Abukari, S. S., Mensah, S. Y., Rabiu, M.
core   +1 more source

Graphene–dielectric integration for graphene transistors [PDF]

open access: yesMaterials Science and Engineering: R: Reports, 2010
Graphene is emerging as an interesting electronic material for future electronics due to its exceptionally high carrier mobility and single-atomic thickness. Graphene-dielectric integration is of critical importance for the development of graphene transistors and a new generation of graphene based electronics.
Lei, Liao, Xiangfeng, Duan
openaire   +2 more sources

Morphology and surface chemistry engineering toward pH-universal catalysts for hydrogen evolution at high current density

open access: yesNature Communications, 2019
Hydrogen production from water provides one avenue toward harnessing renewable energy, although large-scale implementation remains a challenge. Here, authors explore roles of morphology and surface chemistry, and develop efficient catalysts for hydrogen ...
Yuting Luo   +6 more
doaj   +1 more source

Phase separation of hydrogen atoms adsorbed on graphene and the smoothness of the graphene-graphane interface

open access: yes, 2011
The electronic properties of a graphene sheet with attached hydrogen atoms is studied using a modified Falicov-Kimball model on the honeycomb lattice. It is shown that in the ground state this system separates into two phases: fully hydrogenated graphene
Nori, Franco   +3 more
core   +1 more source

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