Resonant tunneling and enhanced Goos–Hänchen shift in a graphene double velocity barrier structure

Wang, Y.; Liu, Y.; Wang, B.

doi:10.1016/j.physe.2013.05.010

Cited by 34 publications

(20 citation statements)

References 39 publications

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“…The investigation of the transport properties of graphene with velocity barriers was done in Refs. [ [27,28,29,30,31,32,33]].…”

Section: Introductionmentioning

confidence: 99%

Controlling the energy gap of graphene by Fermi velocity engineering

Lima¹

2015

Physics Letters A

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The electronic structure of a single-layer graphene with a periodic Fermi velocity modulation is investigated by using an effective Dirac-like Hamiltonian. In a gapless graphene or in a graphene with a constant energy gap the modulation of the Fermi velocity, as expected, only changes the dispersion between energy and moment, turning the minibands narrower or less narrow than in the usual graphene depending on how the Fermi velocity is modulated and the energy gap remains the same. However, with a modulated energy gap it is possible to control the energy gap of graphene by Fermi velocity engineering. This is based on a very simple idea that has never been reported so far. The results obtained here reveal a new way of controlling the energy gap of graphene, which can be used in the fabrication of graphene-based devices

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“…The investigation of the transport properties of graphene with velocity barriers was done in Refs. [ [27,28,29,30,31,32,33]].…”

Section: Introductionmentioning

confidence: 99%

Controlling the energy gap of graphene by Fermi velocity engineering

Lima¹

2015

Physics Letters A

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“…Firstly, a velocity distribution occurs due to the unequal group velocities in different regions. The velocity distribution will have obvious influence on electronic transport, 156 and thus change the oscillating period of supercurrent when the zigzag direction strain is applied, but note that in such a case the zigzag direction strain never induced the mismatch of the wave vector k y due to K Dy ¼ 0. Second, when the armchair direction strain is applied, the mismatch of the wave vectors k y exists due to the Dirac point displacement, which leads to the vanishing of the Andreev bound states and turns off the Josephson supercurrent with a cutoff strain.…”

Section: Strain-manipulated Graphene Superconductor Nanoelectronicsmentioning

confidence: 99%

Generalized Hamiltonian for a graphene subjected to arbitrary in-plane strains

Wang

Liu

2015

Funct. Mater. Lett.

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The interplay between the linear elastic deformation up to 20% and the unique electronic properties of graphene nanostructures offers an attractive prospect to manipulate their properties by strain. Here we review the recent progress on the electronic response of graphene to the in-plane strains, including the strain-modulated electronic structure and the strain-modulated spin, valley and superconducting transports. A generalized Hamiltonian for a graphene was constructed subjected to arbitrary in-plane strains. The Hamiltonian is helpful to design and optimize the graphene-based nano-electromechanical systems (NEMS).

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“…During the few past years there is a considerable progress in studying the quantum GH shift for charge carriers in graphene nanostructures [11][12][13][14][15][16][17][18][19][20][21], because the massless charge carriers in graphene behave like light transferring in an optical medium. The importance of studying the quantum GH shift in graphene not only reflects unique transport properties of Dirac electrons and holes in graphene nanostructures, but also promotes the application of graphene nanostructure in nano electronic devices.…”

Section: Introductionmentioning

confidence: 99%

“…One is that the GH shifts should have enough magnitudes to separate the electrons and holes with different valleys or spins, and the other is that the positive and negative GH shifts can be judged to determine whether the Dirac fermions move upward along the interface or not. Recently, to address the first problem, bound states and resonant tunneling in a graphene double-barrier structure have been used to enhance the magnitude of the GH shift, respectively [15][16][17]. However, few studies are performed to explore the zero, positive and negative GH shifts to address the second problem.…”

Section: Introductionmentioning

confidence: 99%