Spec­tro­scopy of Spin Waves In Perovs­ki­te Ex­ci­ted sta­tes - SWIPE

Pro­ject sum­ma­ry

Today’s best spin-​based com­pu­ting de­vices are still plagued by large power con­sump­ti­on be­cau­se char­ge cur­r­ents are nee­ded to mo­di­fy ma­gne­tic sta­tes. To fully ex­ploit spin­tro­nics, we need to pro­cess, trans­port and store in­for­ma­ti­on wit­hout using char­ge cur­r­ents. The SWIPE pro­ject will pioneer a new route using spin waves (ma­gnons) to carry si­gnals over long di­stances. We will focus on an­ti­fer­ro­ma­gne­tic (AFM) spin waves, which are fast and im­per­vious to per­tur­ba­ti­ons, but har­der to con­trol. Our key pro­po­sal is to use lat­ti­ce vi­bra­ti­ons (pho­nons) to con­trol AFM ma­gnons: Acoustic pho­nons can ge­ne­ra­te and pro­pa­ga­te si­gnals. Op­ti­cal waves can coup­le to elec­tro­nic and ma­gne­tic ex­ci­ta­ti­ons, and mo­di­fy the ma­gnon pro­per­ties. The key ad­van­ta­ge of spin waves is their in­ter­face with non­vo­la­ti­le ma­gne­tic sta­tes, which en­ables ul­tra­low power in­for­ma­ti­on and com­mu­ni­ca­ti­on tech­no­lo­gy. A se­cond im­portant front is sen­sors and ac­tua­tors, made ex­qui­si­te­ly sen­si­ti­ve and ef­fi­ci­ent with ma­gno­nic de­vices.