KSEBOA - KSEB Officers' Association

Friday
Oct 20th
Text size
  • Increase font size
  • Default font size
  • Decrease font size
Home News Power Sector News Computers could run on heat waste, rather than electricity, researchers believe

Computers could run on heat waste, rather than electricity, researchers believe

PDF
Hits smaller text tool iconmedium text tool iconlarger text tool icon
ComputerComputers may soon be able to recycle part of their own waste heat, using gallium manganese arsenide. Researchers at the Ohio State University describe the detection of an effect that converts heat into a quantum mechanical phenomenon - known as spin - in a semiconductor. Once developed, the effect could enable integrated circuits that run on heat, rather than electricity.

This research merges two cutting-edge technologies: thermo-electricity and spintronics, explained team leaders Joseph Heremans, Ohio Eminent Scholar in Nanotechnology, and Roberto Myers of the Ohio State University.

Myers and Heremans have been trying to combine spintronics with thermo-electronics - that is, devices that convert heat to electricity.

"Spintronics is considered as a possible basis for new computers in part because the technology is claimed to produce no heat. Our measurements shed light on the thermodynamics of spintronics, and may help address the validity of this claim," Nature quoted Heremans as saying.

In one possible use of thermo-spintronics, a device could sit atop a traditional microprocessor, and siphon waste heat away to run additional memory or computation.

The researchers studied how heat can be converted to spin polarization- an effect called the spin-Seebeck effect. Researchers at Tohoku University first identified it. Those researchers detected the effect in a piece of metal, rather than a semiconductor.

The new measurements, carried out by team member Christopher Jaworski have provided the first independent verification of the effect in a semiconductor material called gallium manganese arsenide.

Samples of this material were carefully prepared into thin single-crystal films by collaborators Shawn Mack and David Awschalom at the University of California, who also assisted with interpretation of the results.

In the experiment, they heated one side of the sample, and then measured the orientations of spins on the hot side and the cool side. On the hot side, the electrons were oriented in the spin-up direction, and on the cool side, they were spin-down.

The researchers also discovered, to their own surprise, that two pieces of the material do not need to be physically connected for the effect to propagate from one to the other.

"We figured that each piece would have its own distribution of spin-up and spin-down electrons.

"Instead, one side of the first piece was spin up, and the far side of the second piece was spin down. The effect somehow crossed the gap," said Myers.

Despite these new experiments, the origin of the spin-Seebeck effect remains a mystery.

The findings were published in the journal Nature Materials.

Source- economic Times

 

Add comment


Security code
Refresh


 

Random Videos

You need Flash player 6+ and JavaScript enabled to view this video.
Title: Power Quiz 2015 Final - Part-1

Latest Comments

Banner

Reference Book

 

Reference Book on Power

Electrical Engineering-- D' 1/4 Size Hard bound-- 1424 Pages-- Just Rs.1000/- only &n...

Visitors Counter

mod_vvisit_countermod_vvisit_countermod_vvisit_countermod_vvisit_countermod_vvisit_countermod_vvisit_countermod_vvisit_countermod_vvisit_counter
mod_vvisit_counterToday1240
mod_vvisit_counterYesterday3990
mod_vvisit_counterThis Month86748
mod_vvisit_counterLast Month134230

Online Visitors: 80
IP: 54.161.73.123
,
Time: 06 : 48 : 27