Graphene-based tunnel junction

Katkov, V. L.; Osipov, V. A.

doi:10.1134/s0021364013240119

Cited by 14 publications

(12 citation statements)

References 20 publications

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“…In this case, the only influence of gate voltage is to vary slightly the DOS near the Fermi level, which will result in a modest increase of the conductance. Our analysis shows that such behavior takes place in tunnel contacts with armchair boundaries where the local DOS of edge atoms coincides with that for bulk atoms at the Fermi level 32 .…”

supporting

confidence: 60%

Planar graphene tunnel field-effect transistor

Katkov

Osipov

2014

Applied Physics Letters

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supporting

confidence: 60%

Planar graphene tunnel field-effect transistor

Katkov

Osipov

2014

Applied Physics Letters

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“…Relating x − to the instance of creation (which obviously occures inside a delta-pulse following the world line x + = 0), we can write dp x = eE L ∆x − | x + =0 ∼ 2eE L × T , where T is the total time of observation. Hence, in (17) we have…”

Section: Exact Solution For Collision With a Delta-pulsementioning

confidence: 98%

Pair creation by collision of an intense laser pulse with a high-frequency photon beam

Fedotov¹,

Mironov²

2013

Phys. Rev. A

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We consider pair creation by collision of a couple of counterpropagating electromagnetic pulses with arbitrary frequency ratio, mostly in the context of setup with collision of optical and coherent hard X-(or gamma-) ray pulses. This problem is non-perturbative and in general does not admit exact analytical solutions. We discuss several known approaches according to the ratio of the parameters. Certain regions of the parameter space are not covered by the existing approximations or models. We present a new simplified exactly solvable model with one of the pulses being a deltapulse. This model partially fills the yet unexplored gap in the space of parameters. The shape of the momentum distribution of the created particles in such a model is discussed. Even though the model may not have immediate implications for the forthcoming experiments, it can still provide some hints for better understanding of the fully non-perturbative regime and vacuum instability in QED interactions of extremely strong and short laser pulses.

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“…where the first term corresponds to the hopping of the electron between the nearest atoms with the characteristic hopping energy t = 2.8 eV, the second term to the next-nearest hopping with t ′ = 0.2 eV, and the last term corresponds to the tunneling between the nearest ribbons with the tunneling energy τ which can be varied (see Fig.1). Generally, τ should decrease exponentially with distance between the neighbouring ribbonsã τ ≈ t exp(−2(ã − a)/a) 28 , where a is the interatomic distance. We note that asã goes to infinity, the band structure and the conductivity should reduce to those of an individual nanoribbon.…”

Section: Band Structure Calculationmentioning

confidence: 99%

Two-dimensional hyperbolic medium for electrons and photons based on the array of tunnel-coupled graphene nanoribbons

Trushkov

Iorsh

2015

Phys. Rev. B

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We study the electronic band structure and optical conductivity of an array of tunnel-coupled array of graphene nanoribbons. We show that due to the coupling of electronic edge states for the zigzag nanoribbon structure, the Fermi surface can become a hyperbola similarly to the case of the layered metal-dielectric structures, where the hyperbolic isofrequency contours originate from the coupling of localized surface plasmon polaritons. Moreover, we show that for both types of the ribbon edge, the optical response of the structure can be characterized by a uniaxial conductivity tensor, having principal components of the different signs. Therefore, the tunnel-coupled nanoribbon array can be regarded as a tunable hyperbolic metasurface.

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Graphene-based tunnel junction

Cited by 14 publications

References 20 publications

Planar graphene tunnel field-effect transistor

Planar graphene tunnel field-effect transistor

Pair creation by collision of an intense laser pulse with a high-frequency photon beam

Two-dimensional hyperbolic medium for electrons and photons based on the array of tunnel-coupled graphene nanoribbons

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