Related Experiment Video
Updated: Aug 11, 2026

High-Speed Optical Diagnostics of a Supersonic Ping-Pong Cannon
Published on: March 24, 2023
Spin gunn effect
Yunong Qi1, Zhi-Gang Yu, Michael E Flatté
1Optical Science and Technology Center and Department of Physics and Astronomy, University of Iowa, Iowa City, Iowa 52242, USA.
Abstract:
We predict that the flow of unpolarized current in electron-doped GaAs and InP at room temperature is unstable at high electric fields to the dynamic formation of spin-polarized current pulses. Spin-polarized current is spontaneously generated because the conductivity of a spin-polarized electron gas differs from that of an unpolarized electron gas, even in the absence of spin-orbit interaction. Magnetic fields are not required for the generation of these spin-polarized current pulses, although they can help align the polarization of sequential pulses along the same axis.
Related Concept Videos
Atomic Nuclei: Nuclear Relaxation Processes
Atomic Nuclei: Nuclear Spin State Population Distribution
NMR Spectroscopy: Spin–Spin Coupling
Atomic Nuclei: Nuclear Spin State Overview
Atomic Nuclei: Nuclear Spin
Atomic nuclei have a net nuclear spin, , which can have an integer or half-integer value. In atomic nuclei, the spins of protons are paired against each other but not with neutrons, and vice versa. Consequently, an even number of protons does not contribute to...
Motional Emf

