Navigation Links
Graphene and 'spintronics' combo looks promising
Date:1/25/2011

Washington, D.C. (January 25, 2011) -- A team of physicists has taken a big step toward the development of useful graphene spintronic devices. The physicists, from the City University of Hong Kong and the University of Science and Technology of China, present their findings in the American Institute of Physics' Applied Physics Letters.

Graphene, a two-dimensional crystalline form of carbon, is being touted as a sort of "Holy Grail" of materials. It boasts properties such as a breaking strength 200 times greater than steel and, of great interest to the semiconductor and data storage industries, electric currents that can blaze through it 100 times faster than in silicon.

Spintronic devices are being hotly pursued because they promise to be smaller, more versatile, and much faster than today's electronics. "Spin" is a quantum mechanical property that arises when a particle's intrinsic rotational momentum creates a tiny magnetic field. And spin has a direction, either "up" or "down." The direction can encode data in the 0s and 1s of the binary system, with the key here being that spin-based data storage doesn't disappear when the electric current stops.

"There is strong research interest in spintronic devices that process information using electron spins, because these novel devices offer better performance than traditional electronic devices and will likely replace them one day," says Kwok Sum Chan, professor of physics at the City University of Hong Kong "Graphene is an important material for spintronic devices because its electron spin can maintain its direction for a long time and, as a result, information stored isn't easily lost."

It is, however, difficult to generate a spin current in graphene, which would be a key part of carrying information in a graphene spintronic device. Chan and colleagues came up with a method to do just that. It involves using spin splitting in monolayer graphene generated by ferromagnetic proximity effect and adiabatic (a process that is slow compared to the speed of the electrons in the device) quantum pumping. They can control the degree of polarization of the spin current by varying the Fermi energy (the level in the distribution of electron energies in a solid at which a quantum state is equally likely to be occupied or empty), which they say is very important for meeting various application requirements.


'/>"/>

Contact: Jason Socrates Bardi
jbardi@aip.org
301-209-3091
American Institute of Physics
Source:Eurekalert

Related biology news :

1. Sugar and slice make graphene real nice
2. Graphene may hold key to speeding up DNA sequencing
3. White graphene to the rescue
4. First step toward electronic DNA sequencing: Translocation through graphene nanopores
5. Graphene oxide gets green
6. Rice researchers make graphene hybrid
7. 24-carat gold snowflakes improve graphenes electrical properties
8. Engineers develop method to disperse chemically modified graphene in organic solvents
9. UT Southwestern researchers use drug-radiation combo to eradicate lung cancer
10. Triple-combo drug shows promise against antiviral-resistant H1N1, UAB researcher says
11. The ecosystem engineer: Research looks at beavers role in river restoration
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/11/2017)... 11, 2017 Crossmatch®, a globally-recognized leader ... today announced that it has been awarded a ... Activity (IARPA) to develop next-generation Presentation Attack Detection ... "Innovation has been a driving force within Crossmatch ... allow us to innovate and develop new technologies ...
(Date:4/11/2017)... , April 11, 2017 No ... but researchers at the New York University Tandon ... of Engineering have found that partial similarities between ... systems used in mobile phones and other electronic ... The vulnerability lies in the fact ...
(Date:4/6/2017)... , April 6, 2017 Forecasts ... ANPR, Document Readers, by End-Use (Transportation & Logistics, Government ... Oil, Gas & Fossil Generation Facility, Nuclear Power), Industrial, ... Other) Are you looking for a definitive ... ...
Breaking Biology News(10 mins):
(Date:6/28/2017)... ... June 28, 2017 , ... Ovation Fertility continues ... for presentation at the 33rd Annual Meeting of the European Society of ... the world’s top thought leaders in reproductive medicine – are expected to attend ...
(Date:6/27/2017)... ... , ... The recent vote by the American Medication Association to align with ... patients and hopefully sheds new light on the way health insurers, governments and the ... founding partner of Texas Fertility Center . , “This designation is something ...
(Date:6/27/2017)... (PRWEB) , ... June 27, 2017 , ... ... license agreement whereby DuPont gains exclusive rights to the ERS patent portfolio covering ... was formed to commercialize the foundational intellectual property (IP) of the CRISPR-Cas technology ...
(Date:6/23/2017)... IA (PRWEB) , ... June 23, 2017 , ... Biova, ... Henig, Ph.D. has joined Biova’s Board of Directors. Dr. Henig will bring a wealth ... Dr. Henig has served as the Chief Technical and Scientific Officer of four major ...
Breaking Biology Technology: