Electron and Hole Spin Dynamics in Magnetic Semiconductors

✍ Scribed by B. Koopmans; M. van Kampen; W. J. M. de Jonge

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 173 KB
• Volume: 215
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/(sici)1521-3951(199909)215:1<217::aid-pssb217>3.0.co;2-s

✦ Synopsis

We studied the electron and hole spin dynamics in magnetic semiconductor quantum wells on pico-and femtosecond time scales by means of time-resolved magnetization modulation spectroscopy. Spin relaxation times of $10 ps (electrons) and $100 to 200 fs (holes) are found at room temperature for 15/15 monolayer CdTe/Cd 0X88 Mn 0X12 Te structures. Monitoring the decay of an optically induced spin density as a function of the Mn concentration, we conclude that the loss of the electron spin is related to spin-flip scattering via exchange with the large magnetic moments at the Mn sites.