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Birthing a new breed of materials

2013-10-24
(Press-News.org) Contact information: Catherine Meyers
cmeyers@aip.org
301-209-3088
American Institute of Physics
Birthing a new breed of materials Where two different materials meet on the atomic level, a new material can be born that is neither one nor the other. The two parent materials do not mix – they remain distinct from one another – but their marriage begets a strange child with properties unlike those of either parent. These so-called interfacial materials are considered to be a breed of materials in their own right, and, thanks to recent technological advances that allow them to be fabricated in the laboratory, their real-world properties can now be explored.

A discussion of new insights into these interfacial materials, as well as some of the novel properties expected of them, will be given by materials scientist Chang-Beom Eom, Theodore H. Geballe Professor and Harvey D. Spangler Distinguished Professor at the University of Wisconsin at Madison, at the AVS 60th International Symposium and Exhibition, held Oct. 27-Nov. 1, 2013, in Long Beach, Calif.

"Each new interfacial material presents unexplored territory, in much the same way as the discovery of a new bulk material," Eom said. Researchers can use analogies to compare a new interfacial material to bulk materials with similar properties, he continued, "but there is always something unique about the new interfacial material that holds surprises" for the people studying it.

For one such material is born from the marriage between LaAlO3 (lanthanum aluminum oxide) and SrTiO3 (strontium titanium oxide). The parent compounds are insulating, meaning they do not conduct electricity; but the interface where they meet is conducting. Another interfacial material, made of different parent compounds, holds promise for being a topological insulator, a material that allows electrons to move along its surface in a way that fundamentally protects them from the usual defects and imperfections of a conducting substance.

Size is one of the bigger advantages of these new substances compared to bulk materials. Since their unusual behavior is confined to the atom-thin space between two compounds, interfacial materials could one day be used to make tiny devices that consume less power, Eom said.

Theorists had predicted the existence of many of these substances, but modern-day techniques for growing one thin film on top of another with interfaces that are atomically distinct from each other have now made it possible to create these materials in the laboratory.

"Advances over the last ten years in both materials experiment and theory have come together to provide our first real opportunities to broadly explore interfacial materials," Eom said. With a deeper understanding of their unusual properties, Eom continued, researchers may one day be able to customize the materials, combining theory and experiment to design interfacial materials for nanoscale applications.

###

Presentation MG+EM+MI+MS-WeM11, "Multifunctional Interfacial Materials by Design," is at 11:20 a.m. Pacific Time on Wednesday, Oct. 30, 2013.

MORE INFORMATION ABOUT THE AVS 60th INTERNATIONAL SYMPOSIUM & EXHIBITION
The Long Beach Convention Center is located at 300 E. Ocean Blvd., Long Beach, CA 90802.

USEFUL LINKS
Main meeting website: http://www2.avs.org/symposium/AVS60/pages/info.html
Technical Program: http://www.avssymposium.org/

PRESSROOM
The AVS Pressroom will be located in the Long Beach Convention Center. Pressroom hours are Monday-Thursday, 8:00 a.m. - 5:00 p.m. Your press badge will allow you to utilize the pressroom to write, interview, collect new product releases, review material, or just relax. The press badge will also admit you, free of charge, into the exhibit area, lectures, and technical sessions, as well as the Welcome Mixer on Monday Evening and the Awards Ceremony and Reception on Wednesday night.

This news release was prepared for AVS by the American Institute of Physics (AIP).

ABOUT AVS
Founded in 1953, AVS is a not-for-profit professional society that promotes communication between academia, government laboratories, and industry for the purpose of sharing research and development findings over a broad range of technologically relevant topics. Its symposia and journals provide an important forum for the dissemination of information in many areas of science and technology, enabling a critical gateway for the rapid insertion of scientific breakthroughs into manufacturing realities.

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[Press-News.org] Birthing a new breed of materials