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Title [sv]
Polariserade Elektrontillstånd i Diamant
Title [en]
Valley Polarized Electron States in Diamond
Abstract [sv]
In conventional electronic circuits, information is encoded by controlling the amount of electric charge. Alternatively, it is possible to make devices that rely on other quantum properties of electrons than their charge. A highly novel concept is to encode information by using the valley quantum number of electrons. This concept has been termed valleytronics and offers a promising new route to quantum computing and ultrafast data-processing. Our group has recently reported the discovery (Nature Materials, July 2013) that ultra-pure synthetic diamond exhibits uniquely long valley relaxation times, orders of magnitude longer than what is observed in other materials. Besides being able to generate valley polarized currents and detect valley polarization by Hall-effect measurements, we have also demonstrated the world´s first valley transistor. Simulations show that the long valley relaxation times can ultimately be traced ultimately to the ultra-hardness of diamond, implying that diamond is a unique material for valleytronics. The aim of this research proposal is a detailed investigation of valley polarized electron transport both in bulk diamond and in two dimensional inversion layers. In addition, we will study the interaction of valley polarized electrons with lattice defects using a method that we have developed for this purpose. The knowledge generated in this project will directly provide ground-breaking and fundamental progress in the fledgling field of valleytronics.
Principal InvestigatorIsberg, Jan
Coordinating organisation
Uppsala University
Funder
Period
2015-01-01 － 2018-12-31
National Category
Condensed Matter Physics
Identifiers
DiVA, id: project:5354Project, id: 2014-06026_VR

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