Datta-Das transistor for atomtronic circuits using artificial gauge fields

Chetan Sriram Madasu, Mehedi Hasan, Ketan D. Rathod, Chang Chi Kwong, David Wilkowski

Published 2022-03-18Version 1

Spintronics have emerged in the late 1980s mainly triggered by A. Fert and P. Gr\"ungerg's discovery of the giant magnetoresistivity. Since, the spin-dependent electrical injection has found useful applications in storage devices, but fully operational spin-dependent semiconductor electronics remain a challenging task because of weak spin-orbit couplings and/or strong spin relaxations. These limitations are lifted considering atoms instead of electrons or holes as spin carriers. In this emerging field of atomtronics, we demonstrate the equivalent of a Datta-Das transistor using a degenerate fermi gas of strontium atoms as spin carriers in interaction with a tripod laser-beams scheme. We explore the dependence of spin rotation, and we identify two key control parameters which we interpret as equivalent to the gate-source and drain-source voltages of a field effect transistor. Our finding broadens the spectrum of atomtronics devices for implementation of operational spin-sensitive circuits.