Spin transport and tunneling magnetoresistance in Thue-Morse bilayer graphene superlattice with two ferromagnetic electrodes

Li, Yuan-Qiao; Zhang, Hongmei; Zhou, Tao; Liu, De

doi:10.1016/j.physb.2017.04.015

Cited by 7 publications

(2 citation statements)

References 38 publications

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“…In fractal or Cantor graphene superlattices, the spin conductance and TMR exhibit stronger and more irregular oscillations with the Fermi energy [38]. In Thue-Morse bilayer graphene superlattices was found that the spin polarization shows drastic oscillations with the Fermi energy and the TMR presents large values that can be increased with the bias voltage [39]. As we have documented there is some progress in understanding the effects of aperiodicity on the spin-valley polarization and magnetoresistive properties of 2D material superlattices.…”

Section: Introductionmentioning

confidence: 81%

“…In this context, aperiodicity represents an alternative to improve the spin-valley polarization and TMR of MSSLs. In fact, aperiodicity has been instrumental to modulate/improve the spin-valley polarization and TMR of superlattices based on 2D materials [37][38][39]. For instance, in Thue-Morse graphene superlattices, the spin transport and TMR are better than in periodic graphene superlattices [37].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tunneling magnetoresistance and spin-valley polarization of aperiodic magnetic silicene superlattices

Villasana-Mercado¹,

Rojas-Briseño²,

Molina-Valdovinos³

et al. 2022

J. Phys.: Condens. Matter

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Magnetic silicene superlattices (MSSLs) are versatile structures with spin-valley polarization and tunneling magnetoresistance (TMR) capabilities. However, the oscillating transport properties related to the superlattice periodicity impede stable spin-valley polarization states reachable by reversing the magnetization direction. Here, we show that aperiodicity can be used to improve the spin-valley polarization and TMR by reducing the characteristic conductance oscillations of periodic MSSLs (P-MSSLs). Using the Landauer-Büttiker formalism and the transfer matrix method, we investigate the spin-valley polarization and the TMR of Fibonacci (F-) and Thue-Morse (TM-) MSSLs as typical aperiodic superlattices. Our findings indicate that aperiodic superlattices with higher disorder provide better spin-valley polarization and TMR values. In particular, TM-MSSLs reduce considerably the conductance oscillations giving rise to two well-defined spin-valley polarization states and a better TMR than F- and P-MSSLs. F-MSSLs also improve the spin-valley polarization and TMR, however they depend strongly on the parity of the superlattice generation.

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Section: Introductionmentioning

confidence: 81%