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Sound waves do not respond to external magnetic fields and do not have an intrinsic spin degree of freedom. For these reasons, phenomena that are analogues of quantum Hall effect and quantum spin Hall effect are difficult to realize in acoustic systems. By designing acoustic three dimensional meta-crystals with special structures, we show that one can create synthetic staggered flux and hence one-way...
We have experimentally investigated dual-layer fishnet structures in the terahertz regime. The dispersion behavior of the different modes in this structure is inferred from their response to changes in THz wave incident angle and the thickness of the dielectric layer separating the two metallic films. The theory of magnetic plasmon polariton (MPP) is applied to explain the coupled dispersive modes.
Nanowire based magnetic spin valves utilizing a core-shell device architecture about free-standing Ni nanowires have been fabricated and characterized. Devices containing sequential shell layers of CoO(10 nm)-Co(5 nm)-Cu(5 nm)-Co(5 nm) deposited through sputter deposition around the chemical-vapor-deposited Ni core nanowires exhibit a giant magnetoresistance effect of ~9%, which matches that of the...
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