Spin- and valley- dependent energy band and polarization in ferromagnetic silicene superlattice with circularly polarized light

Chang, Lulu; Wu, Qing‐Ping; Zhang, Ruo-Long; Yu-zeng, LI; Liu, Meirong; Xiao, Xunwen; Liu, Zhengfang

doi:10.1016/j.physb.2020.412552

Cited by 14 publications

(7 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1. The low-energy effective Hamiltonian of the ferromagnetic silicene region with the external perpendicular electric field and off-resonant circularly polarized light can be written as [28][29][30][31]…”

Section: Model and Formalismmentioning

confidence: 99%

“…Recently, it is reported that the off-resonant circularly polarized light can open a band gap of the Dirac cone in silicene, [26][27][28] which can lead to the valley separation. [29] In this paper, we investigate the GHL shift of a single silicene barrier with the external perpendicular electric field, the exchange field and the off-resonant circularly polarized light. The GHL shift of spin-polarized can be achieved in silicene with off-resonant circularly polarized light or the exchange field.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Goos–Hänchen-like shift related to spin and valley polarization in ferromagnetic silicene*

Liu¹,

Liu²,

Zhang³

et al. 2021

Chinese Phys. B

Self Cite

View full text Add to dashboard Cite

We study the Goos-Hänchen-like shift of single silicene barrier under the external perpendicular electric field, offresonant circularly polarized light and the exchange field modulation using the stationary-phase method. The results show that the Goos-Hänchen-like shift of silicene resulting from the external perpendicular electric field does not have the characteristics of spin or valley polarization, while that from off-resonant circularly polarized light or the exchange field is spin-polarized. More importantly, the combined effect of the external perpendicular electric field and the exchange field or off-resonant circularly polarized light can cause the Goos-Hänchen-like shift of the system to be spin and valley polarized. It is particularly worth noting that when the three modulations are considered at the same time, as the exchange field changes, the system will have a positive or negative Goos-Hänchen-like shift.

show abstract

Section: Model and Formalismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Goos–Hänchen-like shift related to spin and valley polarization in ferromagnetic silicene*

Liu¹,

Liu²,

Zhang³

et al. 2021

Chinese Phys. B

Self Cite

View full text Add to dashboard Cite

show abstract

“…The spin inversion symmetry between the valleys K and K ′ induces spin-valley currents [25]. Several strategies have been implemented to manipulate the spin and valley polarized currents [26][27][28][29][30][31][32][33][34][35][36], including periodic or superlattice potentials [30][31][32][33][34][35][36]. Of particular interest are magnetic silicene superlattices (MSSLs) due to its possibilities as versatile structures with spin-valley polarization and TMR capabilities [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

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

Villasana-Mercado¹,

Rojas-Briseño²,

Molina-Valdovinos³

et al. 2022

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

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.

show abstract

“…The spin inversion symmetry between the valleys K and K ′ induces spinvalley currents [25]. Several strategies have been implemented to manipulate the spin and valley polarized currents [26][27][28][29][30][31][32][33][34][35][36], including periodic or superlattice potentials [30][31][32][33][34][35][36]. Of particular interest are magnetic silicene superlattices (MSSLs) due to its possibilities as versatile structures with spin-valley polarization and tunneling magnetoresistance capabilities [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

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

Villasana-Mercado¹,

Rojas-Briseño²,

Molina-Valdovinos³

et al. 2022

Preprint

View full text Add to dashboard Cite

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.

show abstract

Spin- and valley- dependent energy band and polarization in ferromagnetic silicene superlattice with circularly polarized light

Cited by 14 publications

References 26 publications

Goos–Hänchen-like shift related to spin and valley polarization in ferromagnetic silicene*

Goos–Hänchen-like shift related to spin and valley polarization in ferromagnetic silicene*

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

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

Contact Info

Product

Resources

About