Datta-Das transistor for atomtronic circuits using artificial gauge fields

TL;DR

This paper demonstrates a Datta-Das transistor analog using a degenerate Fermi gas of strontium atoms manipulated by laser beams, enabling spin-sensitive circuits in atomtronics.

Contribution

It introduces a novel atomtronic transistor model based on atomic spin control with laser fields, expanding the potential for spin-based atomtronic devices.

Findings

Successful implementation of a spin transistor using atomic gases

Identification of control parameters analogous to voltages in FETs

Broadens atomtronics device capabilities for spin-sensitive applications

Abstract

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.