Detection and manipulation of spins in semiconductors and metals

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• Dr. Mark Hickey (Stoner Laboratory, University of Leeds, U.K)
• Monday 20 November 2006, 14:15-15:15
• Mott Seminar Room, Cavendish Laboratory, Department of Physics.

If you have a question about this talk, please contact K DAS GUPTA.

Magneto-electronics, as a field of research comprises two distinct avenues – metal spintronics and semiconductor spintronics. Spin injection experiments from ferromagnetic transition metals and alloys into GaAs and InGaAs quantum wells represent a nice fusion of the two areas. In this talk, the non-equilibrium character of spin states injected into quantum wells and bulk semiconductors will be explored up to room temperature. The optical detection method described here is based on the Hanle effect and this dynamical phenomenon is described by a variation of the Landau-Lifshitz-Gilbert equation. In metals, equilibrium electron spin configurations are computed and measured and their description relies on the same dynamics in the presence of the exchange interaction. Competition between exchange energy and anisotropy energy in metals gives rise to magnetic domains, and the manipulation and detection of these objects by magnetic field and electric current has recently become an subject of furious study.

This talk is part of the Semiconductor Physics series.

This talk is included in these lists:

• All Cavendish Laboratory Seminars
• All Talks (aka the CURE list)
• Centre for Health Leadership and Enterprise
• Featured lists
• ME Seminar
• Mott Seminar Room, Cavendish Laboratory, Department of Physics
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• School of Physical Sciences
• Semiconductor Physics
• Thin Film Magnetic Talks

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