Spin-wave interference patterns for memory and computation.

Ferran Macia, NYU

Abstract:
Spin-wave excitations due to spin-momentum transfer in ferromagnetic thin films will enable new types of information processing and memory storage. This talk shows how arrays of spin-torque nano-oscillators (STNOs) can be used to create anisotropic spin-wave interference patterns and, when pulsed, propagating spin-wave activity. Memristic transponders distributed on the thin film respond to threshold tunnel magnetoresistance (TMR) values thereby detecting the spin-waves and creating new excitation patterns. Arrangements of transponders create resonant (reverberating) spin-wave activity --that may be the basis of polychronous wave computation of arithmetic and Boolean functions as well as information storage.