New spintronic capabilities from 2D crystals

David MacNeill
Event Date and Time: 
Thu, 2018-03-01 11:00 - 12:30
Hennings 318
Local Contact: 
Leanne Ebbs
The 2004 isolation of graphene did more than introduce massless Dirac fermions to device physics -- it also introduced the Scotch tape exfoliation method. In this method, we create micron-sized and atomically-thin single crystals by repeatedly cleaving bulk layered crystals. This provides a new pathway for thin film synthesis complementary to more established techniques. In my talk, I will discuss how these unusual thin films help create new "spintronic" devices that can generate and detect angular momentum flows on the nanoscale. First, I will show how the low symmetry surfaces of layered transition metal dichalcogenides (WTe2 in particular) can generate new forms of angular momentum transfer with potential magnetic memory applications. Second, I will discuss my recent work on the layered magnet CrI3, which was first isolated in monolayer form in 2017. I will present experiments showing that graphite/CrI3/graphite tunnel junctions can act as highly sensitive spin sensors and also allow electronic readout of the CrI3 magnetic state.
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