Positioning of the Fermi Level in Graphene Devices with Asymmetric Metal Electrodes

Kim, Bum-Kyu; Jeon, Eun-Kyoung; Kim, Ju‐Jin; Lee, Jun Young

doi:10.1155/2010/575472

Cited by 7 publications

(3 citation statements)

References 25 publications

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“…Methods section). For Ti, experimentally we determined a potential height of −0.12 eV±0.01 eV which provides still a reasonable match to the −0.23 to −0.28 eV stated in literature 27 28 29 . We conclude that the gate-dependence can qualitatively be related to the energy dependence of Klein tunnelling which provides another decisive and independent check for the claim that the transverse voltage indicates cascaded Mie scattering.…”

Section: Resultssupporting

confidence: 84%

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An electrical analogy to Mie scattering

et al. 2016

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Mie scattering is an optical phenomenon that appears when electromagnetic waves, in particular light, are elastically scattered at a spherical or cylindrical object. A transfer of this phenomenon onto electron states in ballistic graphene has been proposed theoretically, assuming a well-defined incident wave scattered by a perfectly cylindrical nanometer scaled potential, but experimental fingerprints are lacking. We present an experimental demonstration of an electrical analogue to Mie scattering by using graphene as a conductor, and circular potentials arranged in a square two-dimensional array. The tabletop experiment is carried out under seemingly unfavourable conditions of diffusive transport at room-temperature. Nonetheless, when a canted arrangement of the array with respect to the incident current is chosen, cascaded Mie scattering results robustly in a transverse voltage. Its response on electrostatic gating and variation of potentials convincingly underscores Mie scattering as underlying mechanism. The findings presented here encourage the design of functional electronic metamaterials.

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Section: Resultssupporting

confidence: 84%

“…For Pd the analysis of the data in Fig. 2b results in a potential height of +0.06 eV±0.01 eV which matches very well with the +0.08 to +0.09 eV reported 27 28 with no free parameter ( cf . Methods section).…”

Section: Resultssupporting

confidence: 76%

An electrical analogy to Mie scattering

et al. 2016

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“…The possibility of applying a gate voltage to graphene and other 2D materials is perhaps the most important property of these materials. According to we have detailed in this section, it is possible to change the charge density in graphene by a gate voltage, so that a change occurs in its Fermi level [123,124] and consequently in its work function and conductivity. So, managing graphene's work function has many benefits that are not possible to achieve using conventional 3D materials.…”

Section: Fermi Level Control Via Gate Voltagementioning

confidence: 99%

Graphene’s photonic and optoelectronic properties – A review

Wirth-Lima¹,

Alves-Sousa²,

Bezerra-Fraga³

2020

Chinese Phys. B

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Due to its remarkable electrical and optical properties, graphene continues to receive more and more attention from researchers around the world. An excellent advantage of graphene is the possibility of controlling its charge density, and consequently, the management of its conductivity and dielectric constant, among other parameters. It is noteworthy that the control of these properties enables the obtaining of new optical/electronic devices, which would not exist based on conventional materials. However, to work in this area of science, it is necessary to have a thorough knowledge regarding the electrical/optical properties of graphene. In this review paper, we show these graphene properties very well detailed.

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Influence of Fermi‐Level Engineering in Multi‐Interface CuO/Cu₂O||rGO||h‐WO₃||rGO|| Photoelectrodes on Photoelectrochemical CO₂Reduction

Bieńkowski

Małolepszy

Stobiński³

et al. 2022

Energy Tech

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Solar energy is undoubtedly the largest and most economical source of clean energy. However, it currently supplies no more than 2% of the world's energy demand. [1] Moreover, solar energy is diffuse and must be converted by high-performance photocatalyst with the following characteristics: 1) high stability to various electrolytes (corrosive environments), 2) degradation resistance during long-time sunlight exposure, 3) band energetics suitable for the efficient and continuous production of fuels, and (most importantly) 4) fast primary processes that drive the charge-carrier generation, recombination, trapping, and transfer. The processes listed in (4) are essential for optimizing the final performance of a photoelectrode. [2][3][4] In recent years, researchers have explored various nanostructured materials to meet the abovementioned requirements. [5][6][7][8][9] Despite considerable progress in material design and synthesis, the performance in specific processes should be further improved. Photoelectrochemical (PEC) CO 2 reduction is an attractive approach for converting CO 2 into value-added chemical feedstocks (such as CO, CH 4 , CH 3 OH, and HCOOH). [10] However, as clarified in recent findings, junction architectures combining compounds with multifunctional properties can only meet the uphill energy demands of CO 2 reduction. [11] Hybrid CuO/Cu 2 O can be combined with other semiconductors or/and charge transporting layers, forming heterojunctions that improve the photocatalytic performance of an overall system. One drawback of this junction architecture is poor adhesion between the compounds, which causes loss of the catalytic active sites through aggregation or desorption into the

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Positioning of the Fermi Level in Graphene Devices with Asymmetric Metal Electrodes

Cited by 7 publications

References 25 publications

An electrical analogy to Mie scattering

An electrical analogy to Mie scattering

Graphene’s photonic and optoelectronic properties – A review

Influence of Fermi‐Level Engineering in Multi‐Interface CuO/Cu₂O||rGO||h‐WO₃||rGO|| Photoelectrodes on Photoelectrochemical CO₂Reduction

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Positioning of the Fermi Level in Graphene Devices with Asymmetric Metal Electrodes

Cited by 7 publications

References 25 publications

An electrical analogy to Mie scattering

An electrical analogy to Mie scattering

Graphene’s photonic and optoelectronic properties – A review

Influence of Fermi‐Level Engineering in Multi‐Interface CuO/Cu2O||rGO||h‐WO3||rGO|| Photoelectrodes on Photoelectrochemical CO2Reduction

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Product

Resources

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Influence of Fermi‐Level Engineering in Multi‐Interface CuO/Cu₂O||rGO||h‐WO₃||rGO|| Photoelectrodes on Photoelectrochemical CO₂Reduction