Sign In

Communications of the ACM

ACM TechNews

Rechargeable 'spin Battery' Promising For Spintronics and Quantum Computing

View as: Print Mobile App Share:
This schematic describes a proposed spin transfer of electrons to atomic nuclei in materials called topological insulators.

Researchers have shown how to create a rechargeable spin battery made out of materials called topological insulators.

Credit: Jifa Tian/Purdue University

Researchers at Purdue University have produced a rechargeable "spin battery" from topological insulators, technology they say has applications in spintronic devices and quantum computers.

They employed bismuth tellurium selenide flakes with ultra-high purity and little bulk doping.

"Because of the spin-momentum locking, you can make the spin of electrons line up or 'locked' in one direction if you pass a current through the topological insulator material, and this is a very interesting effect," says Purdue professor Yong P. Chen.

The research team is the first to induce a two-day-long electron spin polarization even when the current is turned off.

One theory as to the cause of this effect suggests the spin-polarized electrons could be transferring their polarization to the atomic nuclei in the material.

Purdue's Jifa Tian says this "could enable a rechargeable spin battery and rewritable spin memory for potential applications in spintronics and quantum information systems."

From Purdue University News
View Full Article


Abstracts Copyright © 2017 Information Inc., Bethesda, Maryland, USA


No entries found