Navigation Links
ORNL experiments prove nanoscale metallic conductivity in ferroelectrics
Date:1/9/2012

OAK RIDGE, Tenn -- The prospect of electronics at the nanoscale may be even more promising with the first observation of metallic conductance in ferroelectric nanodomains by researchers at Oak Ridge National Laboratory.

Ferroelectric materials, which switch their polarization with the application of an electric field, have long been used in devices such as ultrasound machines and sensors. Now, discoveries about ferroelectrics' electronic properties are opening up possibilities of applications in nanoscale electronics and information storage.

In a paper published in the American Chemical Society's Nano Letters, the ORNL-led team demonstrated metallic conductivity in a ferroelectric film that otherwise acts as an insulator. This phenomenon of an insulator-metal transition was predicted more than 40 years ago by theorists but has eluded experimental proof until now.

"This finding unambiguously identifies a new conduction channel that percolates through the insulating matrix of the ferroelectric, which opens potentially exciting possibilities to 'write' and 'erase' circuitry with nanoscale dimensions," said lead author Peter Maksymovych of ORNL's Center for Nanophase Materials Sciences.

From an applied perspective, the ability to use only an electric field as a knob that tunes both the magnitude of metallic conductivity in a ferroelectric and the type of charge carriers is particularly intriguing. Doing the latter in a semiconductor would require a change of the material composition.

"Not only can we turn on metallic conductivity, but if you keep changing the bias dials, you can control the behavior very precisely," Maksymovych said. "And the smaller the nanodomain, the better it conducts. All this occurs in the exact same position of the material, and we can go from an insulator to a better metal or a worse metal in a heartbeat or faster. This is potentially attractive for applications, and it also leads to interesting fundamental questions about the exact mechanism of metallic conductivity."

Although the researchers focused their study on a well-known ferroelectric film called lead-zirconate titanate, they expect their observations will hold true for a broader array of ferroelectric materials.

"We also anticipate that extending our studies onto multiferroics, mixed-phase and anti-ferroelectrics will reveal a whole family of previously unknown electronic properties, breaking new ground in fundamentals and applications alike," said co-author and ORNL senior scientist Sergei Kalinin.


'/>"/>
Contact: Morgan McCorkle
mccorkleml@ornl.gov
865-574-7308
DOE/Oak Ridge National Laboratory
Source:Eurekalert

Related biology technology :

1. BioSpace Partners with Journal of Visualized Experiments (JoVE) to Offer Peer-Reviewed Scientific Video Content on BioSpace.com
2. NASA Sets Briefing on New Space Station Science Experiments
3. INTERCIM Received a New Patent for a Non-statistical Approach for "Design of Experiments" and the Iterative Discovery of an Explanatory Model
4. QinetiQ North America and NASA Advance Space Travel with First Forward Osmosis Experiments in Microgravity
5. CardioWest™ Artificial Heart Approved For Highest Reimbursement in CMS History : Plus Up To $53,000 New Technology Add-on Payments
6. Zemea Propanediol Approved as a Natural Ingredient by ECOCERT
7. Dendreon Initiates Second of Two New Phase 2 Trials of PROVENGE for Prostate Cancer
8. Self-assembling polymer arrays improve data storage potential
9. USDA Approves Syngenta and John Deere for Broadened Biotechnology Endorsement for Corn Crop Insurance
10. FDA Approves ALOXI(R) (Palonosetron HCl) Capsules for Prevention of Acute Chemotherapy-induced Nausea and Vomiting
11. Beaumont Doctors Invention Improves Cataract Surgery Outcomes
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/24/2016)... ... May 24, 2016 , ... Last week, Callan Capital, an integrated wealth management ... The Future of San Diego Life Science event at the Estancia La Jolla Resort ... the event with speakers Dr. Rich Heyman, former CEO of Aragon and Seragon, and ...
(Date:5/23/2016)... Zimmer Biomet Holdings, Inc. (NYSE and SIX: ZBH), ... Board of Directors has approved the payment of a quarterly ... The cash dividend of $0.24 per share ... stockholders of record as of the close of business on ... approval of the Board of Directors and may be adjusted ...
(Date:5/23/2016)... ... May 23, 2016 , ... Foresight Institute , ... the winners for the 2015 Foresight Institute Feynman Prizes. , These prestigious ... categories, one for experiment and the other for theory in nanotechnology. Prof. Markus ...
(Date:5/20/2016)... ... May 20, 2016 , ... Korean researchers say Manumycin A ... offer a new way to treat the disease. Surviving Mesothelioma has just posted an ... Scientists from several Korean institutions based their mesothelioma study on the fact the Manumycin ...
Breaking Biology Technology:
(Date:5/12/2016)... 12, 2016 WearablesResearch.com , a brand ... overview results from the Q1 wave of its quarterly ... was consumers, receptivity to a program where they would ... health insurance company. "We were surprised to ... Michael LaColla , CEO of Troubadour Research, "primarily ...
(Date:4/28/2016)... and BANGALORE, India , April 28, 2016 ... a product subsidiary of Infosys (NYSE: INFY ), ... a global partnership that will provide end customers ... mobile banking and payment services.      (Logo: ... innovation area for financial services, but it also plays a ...
(Date:4/26/2016)... April 27, 2016 Research ... Multi-modal Biometrics Market 2016-2020"  report to their offering.  ... The analysts forecast the global multimodal ... 15.49% during the period 2016-2020.  Multimodal ... sectors such as the healthcare, BFSI, transportation, automotive, ...
Breaking Biology News(10 mins):