Ballistic transport through a semiconducting magnetic nanocontact in the presence of Rashba and Dresselhaus spin–orbit interactions

Fallahi, Vahid; Ghanaatshoar, Majid

doi:10.1002/pssb.201147284

Cited by 8 publications

(4 citation statements)

References 31 publications

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“…Transporting the charge and spin transport in a tunneling junction of a Rashba spin orbit coupling (RSOC) system has promising potential for applications in spin-electronic devices because of the non-symmetrical structure inversion leads to coupling between an electron's spin and its wave-vector momentum [1][2][3], which can be tuned by the external gate voltage [4][5][6]. Furthermore, spin-orbit coupling with exchange splitting of the magnetization or with an applied external magnetic field are current topics to investigate the spin-electron transport through various junctions [7][8][9][10][11][12], to produce future spintronic devices [13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Unconventional Rashba Spin-Orbit Coupling on the Charge Conductance and Spin Polarization of a Ferromagnetic/Insulator/Ferromagnetic Rashba Metal Junction

Jantayod

2022

Micromachines

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A ferromagnetic/insulator/ferromagnetic Rashba metal junction (FM/I/FRM) with both Rashba spin–orbit coupling (RSOC) and exchange energy splitting was studied theoretically. Two kinds of interactions in FRM generate the three metallic states in a FRM; the Rashba ring metal (RRM) state, the anomalous Rashba metal (ARM) state and the normal Rashba metal (NRM) state. The scattering method and the free-electron model are used to describe the transport properties of particles and to calculate the conductance spectrum and the spin polarization of current in the junction. The conductance spectrum in the applied voltage shows the prominent features at the boundaries not only for the three states of the FRM but also in the ARM state. In addition, the conductance in the RRM and ARM states is strongly influenced by both the thickness and barrier height of the insulator layer. We also found that the spin polarization obtains a high value in the ARM state and is not affected by the qualities of the insulator, unlike the RRM and NRM states. Obtaining high-spin polarization from FRM material can be useful to produce spintronic devices in future devices.

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Section: Introductionmentioning

confidence: 99%

Unconventional Rashba Spin-Orbit Coupling on the Charge Conductance and Spin Polarization of a Ferromagnetic/Insulator/Ferromagnetic Rashba Metal Junction

Jantayod

2022

Micromachines

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“…1(a)] 12,13 . Current topic of spintronics is to study charge transport in the presence of spin-orbit coupling with magnetization or an applied magnetic field [14][15][16][17][18][19][20][21][22][23][24][25] .…”

Section: Introductionmentioning

confidence: 99%

Tunneling Conductance in Two-Dimensional Junctions between a Normal Metal and a Ferromagnetic Rashba Metal

2018

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We have studied charge transport in ferromagnetic Rashba metal (FRM), where both Rashba type spin-orbit coupling (RSOC) and exchange coupling coexist. It has nontrivial metallic states, i.e., normal Rashba metal (NRM), anomalous Rashba metal (ARM), and Rashba ring metal (RRM), and they are manipulated by tuning the Fermi level with an applied gate voltage. We theoretically studied tunneling conductance (G) in a normal metal / FRM junction by changing the Fermi level via an applied gate voltage (V g ) on the FRM. We found a wide variation in the V g dependence of G, which depends on the metallic states. In NRM, the V g dependence of G is the same as that in a conventional two-dimensional system. However, in ARM, the V g dependence of G is similar to that in a conventional one (two)-dimensional system for a large (small) RSOC. Furthermore, in RRM, which is generated by a large RSOC, the V g dependence of the G is similar to that in the one-dimensional system. In addition, these anomalous properties stem from the density of states in ARM and RRM caused by the large RSOC and exchange coupling rather than the spin-momentum locking of RSOC.

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“…Recently, various spin-dependent transports in the presence of spin-orbit couplings (SOCs) have been discussed. Among the spin-dependent transports due to the SOCs, Rashba and Dresselhaus spin-orbit coupling (RSOC and DSOC, respectively) have been intriguingly studied [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] . RSOC and DSOC are caused by the structural and bulk inversion symmetry breaking, respectively [21][22][23][24][25] .…”

Section: Introductionmentioning

confidence: 99%

“…Hence, the spin polarization is generated by the applied electric field and its polarization is perpendicular (parallel) to the applied electric field in the presence of RSOC (DSOC). In the context of a ballistic regime, spin-dependent tunneling conductance has been studied in twodimensional systems 1-3,5,7,8, [10][11][12][13][14][15][16][17][18]20,[27][28][29][30][31][32][33][34] .…”

Section: Introductionmentioning

confidence: 99%

Spin-Dependent Conductance in a Junction with Dresselhaus Spin-Orbit Coupling

Oshima,

Taguchi,

Tanaka

2018

Preprint

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We studied spin-dependent conductance in a normal metal (NM)/NM junction with Dresselhaus spin-orbit coupling (DSOC) and magnetization along the out-of-plane direction. As a reference, we also studied the spin-dependent conductance in such a junction with Rashba spin-orbit coupling (RSOC). Using a standard scattering method, we calculated the gate-voltage dependence of the spin-dependent conductances in DSOC and RSOC. In addition, we calculated the gate-voltage dependence of the conductances in a ferromagnetic metal (FM)/NM junction with spin-orbit coupling and magnetization, which we call ferromagnetic spin-orbit metal (FSOM). From these results, we discuss the relation between these conductance in the presence of DSOC and that in the presence of RSOC. We found that conductance in DSOC is the same as that in RSOC for the NM/FSOM junction. In addition, we found that in the FM/FSOM junction, the conductance in DSOC is the same as that in RSOC.

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Ballistic transport through a semiconducting magnetic nanocontact in the presence of Rashba and Dresselhaus spin–orbit interactions

Cited by 8 publications

References 31 publications

Unconventional Rashba Spin-Orbit Coupling on the Charge Conductance and Spin Polarization of a Ferromagnetic/Insulator/Ferromagnetic Rashba Metal Junction

Unconventional Rashba Spin-Orbit Coupling on the Charge Conductance and Spin Polarization of a Ferromagnetic/Insulator/Ferromagnetic Rashba Metal Junction

Tunneling Conductance in Two-Dimensional Junctions between a Normal Metal and a Ferromagnetic Rashba Metal

Spin-Dependent Conductance in a Junction with Dresselhaus Spin-Orbit Coupling

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