Spin filtering in a ferromagnetic graphene superlattice

Faizabadi, Edris; Esmaeilzadeh, Mahdi; Sattari, Farhad

doi:10.1140/epjb/e2012-30073-7

Cited by 19 publications

(9 citation statements)

References 27 publications

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“…They found strongly spin-dependent minibands and minigaps, but they did not study the effect of a bias voltage, nor have they found NDR. Niu et al 21 and Faizabadi et al 22 have investigated a superlattice made of gated ferromagnetic strips on top of graphene. However, the finite width of the GNR and the quantization of the transverse momentum was not taken into account.…”

Section: Introductionmentioning

confidence: 99%

Strong spin-dependent negative differential resistance in composite graphene superlattices

et al. 2013

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We find clear signatures of spin-dependent negative differential resistance in compound systems comprising a graphene nanoribbon and a set of ferromagnetic insulator strips deposited on top of it. The periodic array of ferromagnetic strips induces a proximity exchange splitting of the electronic states in graphene, resulting in the appearance of a superlattice with a spin-dependent energy spectrum. The electric current through the device can be highly polarized and both the current and its polarization manifest nonmonotonic dependence on the bias voltage. The device operates therefore as an Esaki spin diode, which opens possibilities to design new spintronic circuits.

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Section: Introductionmentioning

confidence: 99%

Strong spin-dependent negative differential resistance in composite graphene superlattices

et al. 2013

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“…We also studied for the graphene superlattice with an applied electric field before [33], but here, we theoretically investigate the spin-dependent transport of electrons through multiple quantum barriers on an ML-MoS 2 under the influence of an external magnetic field. The so-called Zeeman effect occurs, and the number of barriers has varied to reach an ML-MoS 2 superlattice so that we can obtain a 100% spin polarization with the spin-flip.…”

Section: Introductionmentioning

confidence: 99%

Spin-resolved transport properties in molybdenum disulfide superlattice

et al. 2019

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The effects of the perpendicular magnetic field on the multi-barriers system of 5-barriers to 100-barriers are studied. Considering the low-energy Hamiltonian of the system with spin-orbit coupling we modulate the external magnetic field as the Zeeman energy on the orbital magnetic moment. The transport of an incident electron passing through the superlattice created by the top-gated monolayer MoS2 based on the transfer matrix method is investigated and the spin-up and the spin-down transmissions and the spin-polarization for 5-barriers to 100-barriers are obtained. Comparing the results show that in the case of 30-barriers, we have both reliable transmissions for the system and a 100% spin-polarization so that the spin-flip can occur and gives us a desired spintronic device. We also sketched the variations of the transmissions and spin-polarization versus the relative barrier-widths over the well-widths, (D/W), which show the optimum value is 1 by 2, respectively. Finally, we calculate the spin-up and spin-down conductance and total conductivity of the system which shows the so-called resonant tunneling peaks and amplifying the internal spin-orbit coupling with the external magnetic field as the Zeeman energy.

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“…Transport properties in several superlattices have been studied and lots of interesting results have been achieved [18][19][20][21][22][23][24][25][26][27][28]. The transport properties in graphene superlattice structure were first studied in Ref.…”

Section: Introductionmentioning

confidence: 99%

Calculation of current density for graphene superlattice in a constant electric field

Sattari

2015

J Theor Appl Phys

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Based on the transfer-matrix method, this paper has investigated the electrical transport properties in monolayer and bilayer graphene superlattices modulated by a homogeneous electric field. It is found that the angular range of the transmission probability can be efficiently controlled by the number of barriers. In addition, current density has an oscillatory behavior with respect to external field and Fermi energy. In other words, the current density in monolayer and bilayer graphene superlattices can be controlled by changing either the external field or the Fermi energy. Meanwhile, in the bilayer system unlike monolayer structure the value of current density can be zero. So, for designing electronic devices, bilayer graphene is more efficient.

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Spin filtering in a ferromagnetic graphene superlattice

Cited by 19 publications

References 27 publications

Strong spin-dependent negative differential resistance in composite graphene superlattices

Strong spin-dependent negative differential resistance in composite graphene superlattices

Spin-resolved transport properties in molybdenum disulfide superlattice

Calculation of current density for graphene superlattice in a constant electric field

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