Observation of polaron dynamics in magnetic quantum wells

作者：D. D. Awschalom, M. R. Freeman, Nitin Samarth, Hong‐Gang Luo, J. K. Furdyna · 发表于：Physical Review Letters · 年份：1991 · DOI：10.1103/physrevlett.66.1212 · 被引用次数：81 · 研究领域：Semiconductor Quantum Structures and Devices、Electronic and Structural Properties of Oxides、Advanced Semiconductor Detectors and Materials

Femtosecond spectroscopic measurements of optically induced magnetization are performed on new type-II ZnTe/${\mathrm{Cd}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Mn}}_{\mathit{x}}$Se diluted-magnetic-semiconductor heterostructures consisting of magnetic quantum wells confined by nonmagnetic barrier layers. The formation and evolution of electron-based bound magnetic polarons in the wells is observed through static and time-domain experiments. Energy-dependent magnetic spin dynamics on ultrashort time scales are seen to vary dramatically with the degree of electronic confinement.