Spin transport and wavevector-dependent spin filtering through magnetic graphene superlattice

Sattari, Farhad; Faizabadi, Edris

doi:10.1016/j.ssc.2013.11.014

Cited by 18 publications

(7 citation statements)

References 27 publications

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“…(2), we suppose that an incident electron from the left side will go toward the interface with incident angle u. The general solution to the HamiltonianĤ can be expressed in the following form [11,[33][34][35]:…”

Section: Model and Methodsmentioning

confidence: 99%

Rashba spin–orbit effect on dwell time in graphene asymmetrical barrier

Sattari

2014

Appl. Phys. A

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We investigated the dwell time of electrons tunneling through an asymmetric barrier in monolayer graphene with the Rashba spin-orbit interaction (RSOI). The results show that the dwell time oscillates by increasing the barrier width, RSOI strength, and the bias voltage. In addition, when an external electric field is present, the spin polarization can be observed, whereas for the RSOI alone it is zero. Furthermore, it is found that electrons with different spin orientations will spend different times through the barrier. The difference of the dwell time between spin-up and spin-down electrons arises from the Rashba spin-orbit interaction. It can be concluded that Rashba spin-orbit effect can cause a natural spin filter mechanism in the time domain.

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Section: Model and Methodsmentioning

confidence: 99%

Rashba spin–orbit effect on dwell time in graphene asymmetrical barrier

Sattari

2014

Appl. Phys. A

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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%

“…In Ref. [27], the spin transport properties of magnetic graphene superlattice in the presence of Rashba spin-orbit interaction was studied and found that the magnetoresistance ratio shows a strong dependence on the number of magnetic barriers. In all mentioned works the transport properties in graphene superlattice were studied in absence of the external electric field.…”

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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“…The transmission probability coefficient and the characteristics of the relationship between current density and voltage in a finite superlattice were firstly studied by Esaki and Tsu in 1973 [24]. Since the experimental realization of graphene superlattices [25][26][27], the transport properties in graphene superlattice were extensively investigated [28][29][30][31][32][33][34][35][36]. The transport properties in graphene-based superlattice structure were first studied by Bai and Zhang [28] the authors found that the conductivity of the graphene superlattice depends on the superlattice structural parameters.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. [30], the spin transport in graphene superlattice in the presence of Rashba spin-orbit interaction was studied and found that the conductance and the magneto resistance exhibit oscillatory behavior with the gate voltage. The conductance of a disordered graphene superlattice was investigated in Ref.…”

Section: Introductionmentioning

confidence: 99%

Spin-polarized current produced by graphene superlattice

Sattari

2015

Physics Letters A

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Spin transport and wavevector-dependent spin filtering through magnetic graphene superlattice

Cited by 18 publications

References 27 publications

Rashba spin–orbit effect on dwell time in graphene asymmetrical barrier

Rashba spin–orbit effect on dwell time in graphene asymmetrical barrier

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

Spin-polarized current produced by graphene superlattice

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