Spin coherence of electrons and holes in ZnSe‐based quantum wells studied by pump–probe Kerr rotation

Abstract

Spin coherence of resident electrons and holes is measured in ZnSe‐based quantum wells by means of time‐resolved Kerr rotation technique. At a temperature of 1.8 K spin dephasing time for localized electrons can be as long as 33 ns, and for holes of 0.8 ns. Electron spin precession is clearly observed in a wide temperature range up to 230 K. The electron spin dephasing becomes much shorter of 0.2 ns for the quantum well with a high‐density electron gas. Using vector magnet all components of the g‐factors tensor are evaluated for the electrons and heavy‐holes, revealing strong anisotropy for the heavy‐holes.