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SEMINAR: Exploring Spin and charge dynamics in semiconductors with mechanical stress

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Today's date is Sunday, March 07, 2021
Exploring Spin and charge dynamics in semiconductors with mechanical stress Other events...
Mechanical stress modifies the electronic structure of solids, and resulting variations in static properties such as charge carrier effective masses are widely exploited in modern, solid-state electronic devices. I will show that radically different electromechanical properties can be observed in the space charge limited current regime of nanoscale devices or in the sub-threshold region of transistors. In particular, stress-induced changes to the capture and emission rates of deep defect centres can result in changes to the electrical properties which are orders of magnitude larger than the usual static electronic structure effects. In addition to discussing possible practical consequences of these observations, I will outline several experiments of interest for active spintronics in which mechanical stress can be used to significantly modify either defect or free charge carrier spin dynamics. In these cases I will describe how the ability to modify spin with stress is a novel manifestation of the spin-orbit interaction
Speaker(s) Alistair Rowe, present Associate Professor, CNRS, Ecole Polytechnique, CentraleSupélec, Responsible for running research/teaching programs at two French grandes écoles. Research keywords: semiconductors, spin, transport, spin/charge coupling, mechanical stress, piezoresistance, defects, nanostructures. Teaching keywords: solid state physics, spin-orbit interaction, equilibrium statistical physics
Location Ross Lecture Theatre
Contact John Brookes <[email protected]>
Start Fri, 23 Feb 2018 14:00
End Fri, 23 Feb 2018 15:00
Submitted by John Brookes <[email protected]>
Last Updated Tue, 30 Jan 2018 15:57
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