Navigation Links
Putting the squeeze on an old material could lead to 'instant on' electronic memory

The technology of storing electronic information from old cassette tapes to shiny laptop computers has been a major force in the electronics industry for decades.

Low-power, high-efficiency electronic memory could be the long-term result of collaborative research led by Cornell materials scientist Darrell Schlom. The research, to be published April 17 in the journal Science (Vol. 324 No. 5925), involves taking a well-known oxide, strontium titanate, and depositing it on silicon in such a way that the silicon squeezes it into a special state called ferroelectric a result that could prove key to next-generation memory devices.

Ferroelectric materials are found today in "smart cards" used in many subways and ski resorts. The credit card-sized devices are made with such materials as lead zirconium titanate or strontium bismuth tantalate, which can instantly switch between different memory states using very little electric power. A tiny microwave antenna inside the card, when waved before a reader, reveals and updates stored information.

For more than half a century, scientists have wanted to use ferroelectric materials in transistors, which could lead to "instant-on" computing no more rebooting the operating system or accessing memory slowly from the hard drive. No one has yet achieved a ferroelectric transistor that works.

"Adding new functionality to transistors can lead to improved computing and devices that are lower power, higher speed and more convenient to use," said Schlom, professor of materials science and engineering. "Several hybrid transistors have been proposed specifically with ferroelectrics in mind. By creating a ferroelectric directly on silicon, we are bringing this possibility closer to realization."

Ordinarily, strontium titanate in its relaxed state is not ferroelectric at any temperature. The researchers have demonstrated, however, that extremely thin films of the oxide just a few atoms thick become ferroelectric when squeezed atom by atom to match the spacing between the atoms of underlying silicon.

"Changing the spacing between atoms by about 1.7 percent drastically alters the properties of strontium titanate and turns it into a material with useful memory properties," said Long-Qing Chen, professor of materials science and engineering at Pennsylvania State University, a member of the research team whose calculations predicted the observed behavior five years ago.

Schlom called the work a good example of "theory-driven research."

"From various predictions, some dating back nearly a decade, we knew exactly what we were after, but it took our team years to achieve and demonstrate the predicted effect," he said.

The researchers described successfully growing the strontium titanate on top of silicon the semiconductor found in virtually all electronic devices using molecular-beam epitaxy, a technique akin to atomic spray painting.

"The technological implications are staggering," said Jeremy Levy, professor of physics and astronomy at the University of Pittsburgh, the research team member whose measurements showed the thin strontium titanate layers on silicon to be ferroelectric.


Contact: Blaine Friedlander
Cornell University

Related biology technology :

1. Putting a new spin on current research
2. Putting stem cell research on the fast track
3. U of T physicists squeeze light to quantum limit
4. Biomoda, Inc. (BMOD) SqueezeTrigger Price is $0.27. Approximately 1 Million Shares Shorted Since November 2006 According to Research Report
5. Connecting Materials Science With Biology, K-State Engineers Create DNA Sensors That Could Identify Cancer Using Material Only One Atom Thick
6. Researchers create catalysts for use in hydrogen storage materials
7. How Long Will the Economic Downturn Affect the Dental Biomaterials Market?
8. MIT: New material could lead to faster chips
9. New organic material may speed Internet access
10. Quantum dots and nanomaterials: Ingredients for better lighting and more reliable power
11. Nanotechnologists gain powerful new materials probe
Post Your Comments:
(Date:6/24/2016)... , June 24, 2016 Epic ... sensitively detects cancers susceptible to PARP inhibitors by ... tumor cells (CTCs). The new test has already ... therapeutics in multiple cancer types. Over ... DNA damage response pathways, including PARP, ATM, ATR, ...
(Date:6/23/2016)... WA (PRWEB) , ... June 23, 2016 , ... ... announces the release of its second eBook, “Clinical Trials Patient Recruitment and Retention ... recruitment and retention in this eBook by providing practical tips, tools, and strategies ...
(Date:6/23/2016)... June 23, 2016 /PRNewswire/ - FACIT has announced ... biotechnology company, Propellon Therapeutics Inc. ("Propellon" ... commercialization of a portfolio of first-in-class WDR5 inhibitors ... such as WDR5 represent an exciting class of ... precision medicine for cancer patients. Substantial advances have ...
(Date:6/23/2016)... Lawrence, MA (PRWEB) , ... June 23, 2016 ... ... the Peel Plate® YM (Yeast and Mold) microbial test has received AOAC Research ... test platform of microbial tests introduced last year,” stated Bob Salter, Vice President ...
Breaking Biology Technology:
(Date:6/2/2016)... YORK , June 2, 2016   The Weather ... is announcing Watson Ads, an industry-first capability in which consumers ... by being able to ask questions via voice or text ... Marketers have long sought ... the consumer, that can be personal, relevant and valuable; and ...
(Date:5/16/2016)... , May 16, 2016   EyeLock LLC , ... announced the opening of an IoT Center of Excellence ... and expand the development of embedded iris biometric applications. ... level of convenience and security with unmatched biometric accuracy, ... identity aside from DNA. EyeLock,s platform uses video technology ...
(Date:4/28/2016)... Sweden , April 28, 2016 First ... M (139.9), up 966% compared with the first quarter of 2015 ... profit totaled SEK 589.1 M (loss: 18.8) and the operating margin ... 7.12 (loss: 0.32) Cash flow from operations was SEK ... The 2016 revenue guidance is unchanged, SEK 7,000-8,500 M. ...
Breaking Biology News(10 mins):