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Prof. Rokhinson — NSF Career Award

03/01/2004

Prof. Leonid Rokhinson

Spin Degree of Freedom in Hole Semiconductor Nanostructures

Professor Leonid Rokhinson conducts research in solid state mesoscopic systems. He has worked at Princeton as a Postdoctoral Research Associate and a Staff Scientist for the past six years. His work explores electron transport in mesoscopic systems, Spintronics, and novel materials and devices. He has observed coherent electron transport in a Si quantum dot dimer and studied magnetic effects on few-electron Si quantum dots. Recently he has applied this research to the development of spintronics in Si quantum dots. Spintronic devices utilize both the spin and the charge of the electron. The additional degree of freedom offers the possibility of devices that surpass conventional electronic devices. When a magnetic field is applied the spins of the electrons in the quantum dot now play a role in the transport of those electrons and on the energy level structure of the electrons in the dot. A spintronic device allows additional information to be stored as a particular spin orientation (aligned or anti-aligned with the magnetic field). This spin coherence is long-lived which makes spintronic devices particularly attractive for memory storage and magnetic sensors applications, and, perhaps even for quantum computing. His work also looks at the fabrication and the analysis of such novel devices as voltage tunable two-color infrared photodetectors.