TY - JOUR
A1 - Björnson, Kristofer
A1 - Black-Schaffer, Annica M.
T1 - Solid-state Stern–Gerlach spin splitter for magnetic field sensing, spintronics, and quantum computing
JF - Beilstein Journal of Nanotechnology
Y1 - 2018///
VL - 9
SP - 1558
EP - 1563
SN - 2190-4286
M3 - doi:10.3762/bjnano.9.147
N2 - We show conceptually that the edge of a two-dimensional topological insulator can be used to construct a solid-state Stern–Gerlach spin splitter. By threading such a Stern–Gerlach apparatus with a magnetic flux, Aharanov–Bohm-like interference effects are introduced. Using ferromagnetic leads, the setup can be used to both measure magnetic flux and as a spintronics switch. With normal metallic leads a switchable spintronics NOT-gate can be implemented. Furthermore, we show that a sequence of such devices can be used to construct a single-qubit SU(2)-gate, one of the two gates required for a universal quantum computer. The field sensitivity, or switching field, b, is related to the characteristic size of the device, r, through b = h/(2πqr2), with q being the unit of electric charge.
ER -