Transport signatures of top-gate bound states with strong Rashba–Zeeman effect

Abstract

We suggest a single-mode spin injection scheme in non-ferromagnetic quantum channels utilizing perpendicular strong Rashba spin-orbit and Zeeman fields. By applying a positive top-gate potential in order to inject electrons from the spin-orbit gap to the low-energy regime, we observe coherent destruction of transport signatures of a hole-like quasi-bound state, an electron-like quasi-bound state, or a hole-like bound state features that are sensitive to the selection of the top-gate length along the transport direction.

Unconventional gate voltage dependence of the charge conductance caused by spin-splitting Fermi surface by Rashba-type spin-orbit coupling

“…As a result, RSOC affects the charge transport of the 2DEG. Thus, the gate voltage (V g ) dependence (i.e., Fermi level dependence) of the charge conductance of normal metal (NM)/2DEG junctions has been studied [8][9][10][11][12][13][14][15][16] .…”

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

“…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] .…”

Multichannel scattering mechanism behind the reentrant conductance feature in nanowires subject to strong spin-orbit coupling

“…The preliminary theoretical prediction of a re-entrant behaviour of the conductance was ascribed to the opening of a pseudogap in the energy dispersion of the NW by combining SOC and a magnetic field 9 . Both theoretical and experimental validations of such a prediction in InAs and InSb NWs have been attempted for some time 1,6,7,[13][14][15] . However, the result found in Ref.…”

“…1 is surprising because there is no pseudogap when the magnetic field is absent. In turn, theoretical models that predict the pseudogap opening consider the concurrence of three factors: the SOC along the whole NW 9,14,15 , a magnetic field, and a spatial potential localized in a finite region, which controls the re-entrant behavior by tuning the energy into the pseudogap. Particularly, in the experiment described in Ref.…”