Wednesday, July 23, 2014
Search
  
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
Sony Invests in Image Sensor Production
Ultra-High-Definition TVs Still Lack Market Penetration
Lumia 530 Entry-level Windows Phone Released
ASUS Launches the RT-AC87 Dual-Band Wireless-AC2400 Gigabit Router
LG Introduces Games For Quickcircle Case
UHDTVs Boost LG Display Profit
Microsoft's Profit Hurt By Nokia Acquisition
Apple's Revenue Boosted By China Growth
Active Discussions
help questions structure DVDR
Made video, won't play back easily
Questions durability monitor LCD
Questions fungus CD/DVD Media, Some expert engineer in optical media can help me?
CD, DVD and Blu-ray burning for Android in development
IBM supercharges Power servers with graphics chips
Werner Vogels: four cloud computing trends for 2014
Video editing software.
 Home > News > General Computing > IBM Sci...
Last 7 Days News : SU MO TU WE TH FR SA All News

Tuesday, August 14, 2012
IBM Scientists Closer To Using Spintronics in Computing


Aiming to use electron spins for storing, transporting and processing information, researchers from IBM and scientists at ETH Zurich revealed the first-ever direct mapping of the formation of a persistent spin helix in a semiconductor.

Until now, it was unclear whether or not electron spins possessed the capability to preserve the encoded information long enough before rotating. Unveiled in the peer-reviewed journal Nature Physics, scientists from IBM Research and the Solid State Physics Laboratory at ETH Zurich demonstrated that synchronizing electrons extends the spin lifetime of the electron by 30 times to 1.1 nanoseconds - the same time it takes for an existing 1 GHz processor to cycle.

Today's computing technology encodes and processes data by the electrical charge of electrons. However, this technique is limited as the semiconductor dimensions continue to shrink to the point where the flow of electrons can no longer be controlled. Spintronics could surmount this approaching impasse by harnessing the spin of electrons instead of their charge.

This new understanding in spintronics not only gives scientists unprecedented control over the magnetic movements inside devices but also opens new possibilities for creating more energy efficient electronics.

A previously unknown aspect of physics, the scientists observed how electron spins move tens of micrometers in a semiconductor with their orientations synchronously rotating along the path similar to a couple dancing the waltz, the famous Viennese ballroom dance where couples rotate.

Dr. Gian Salis of the Physics of Nanoscale Systems research group at IBM Research - Zurich explains, "If all couples start with the women facing north, after a while the rotating pairs are oriented in different directions. We can now lock the rotation speed of the dancers to the direction they move. This results in a perfect choreography where all the women in a certain area face the same direction. This control and ability to manipulate and observe the spin is an important step in the development of spin-based transistors that are electrically programmable."

How it works

IBM scientists used ultrashort laser pulses to monitor the evolution of thousands of electron spins that were created simultaneously in a very small spot. Atypically, where such spins would randomly rotate and quickly lose their orientation, for the first time, the scientists could observe how these spins arrange neatly into a regular stripe-like pattern, the so-called persistent spin helix.

The concept of locking the spin rotation was originally proposed in theory back in 2003 and since that time some experiments have even found indications of such locking, but until now it had never been directly observed.

IBM scientists imaged the synchronous "waltz" of the electron spins by using a time-resolved scanning microscope technique. The synchronization of the electron spin rotation made it possible to observe the spins travel for more than 10 micrometers or one-hundredth of a millimeter, increasing the possibility to use the spin for processing logical operations, both fast and energy-efficiently.

The reason for the synchronous spin motion is a carefully engineered spin-orbit interaction, a physical mechanism that couples the spin with the motion of the electron. The semiconductor material called gallium arsenide (GaAs) was produced by scientists at ETH Zurich who are known as world experts in growing ultraclean and atomically precise semiconductor structures. GaAs is a III/V semiconductor commonly used in the manufacture of devices such as integrated circuits, infrared light-emitting diodes and highly efficient solar cells.

Transferring spin electronics from the laboratory to the market still remains a major challenge. Spintronics research takes place at very low temperatures at which electron spins interact minimally with the environment. In the case of this particular research, IBM scientists worked at 40 Kelvin.


Previous
Next
Fraunhofer Develops Smart Wireless Power Outlets        All News        RIM's BB10 Available For Licensing Soon
Fraunhofer Develops Smart Wireless Power Outlets     General Computing News      Google Plus Gets Verified Accounts

Get RSS feed Easy Print E-Mail this Message

Related News
Apple and IBM Partner On Enterprise Mobility
IBM Announces $3 Billion Investment In Future Chip Research
IBM To Help China Deliver on Ambitious Energy and Environmental Goals
China Clears IBM, Lenovo Server Deal
IBM Hopes Nanotube Transistors Are Coming Aroud 2020
IBM May Sell Chip-Making Unit to Globalfoundries: report
IBM Ships POWER8 Power System Servers
IBM Patent Helps Eliminate Fraudulent Behavior in the Cloud
IBM And Fujifilm Squeeze Really Big Data In Magnetic Tapes
Researchers Discover New 'Self-healing' Industrial Polymers
IBM Develops Ultra-fast Phase Change Memory System
IBM Tackles Big Data Challenges with Open Server Model

Most Popular News
 
Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2014 - All rights reserved -
Privacy policy - Contact Us .