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Under Pressure: Germanium

By Guest PostApril 11, 2011Scienceatomic number, China, condensed matter, condensed matter theory, crystal structures, element, fiber optic systems, flowers, germanium, ho kwang mao, next generation computer architecture, phonons, pressure, series of phase transitions, superconductivity, vibrations, viktor struzhkin, xiao-jia chen

Washington, D.C. — Although its name may make many people think of flowers, the element germanium is part of a frequently studied group of elements, called IVa, which could have applications for next-generation computer architecture as well as implications for fundamental condensed matter physics.

New research conducted by Xiao-Jia Chen, Viktor Struzhkin, and Ho-kwang (Dave) Mao from Geophysical Laboratory at Carnegie Institution for Science, along with collaborators from China, reveals details of the element’s transitions under pressure. Their results show extraordinary agreement with the predictions of modern condensed matter theory. (more…)

Delving Into Manganite Conductivity

By Guest PostFebruary 14, 2011Sciencealexander goncharov, atmospheres, breakthrough, chemical compounds, conductivity, electric charges, jahn teller effect, lamno3, magnetic random access memories, magnetic sensors, magnetoresistance, manganites, maria baldini, metallic state, mysterious ways, non conductive insulating state, spintronic devices, structure, viktor struzhkin

Washington, D.C.— Chemical compounds called manganites have been studied for many years since the discovery of colossal magnetoresistance, a property that promises important applications in the fields of magnetic sensors, magnetic random access memories and spintronic devices. However, understanding—and ultimately controlling—this effect remains a challenge, because much about manganite physics is still not known. A research team lead by Maria Baldini from Stanford University and Carnegie Geophysical Laboratory scientists Viktor Struzhkin and Alexander Goncharov has made an important breakthrough in our understanding of the mysterious ways manganites respond when subjected to intense pressure. (more…)

Roller Coaster Superconductivity Discovered

By Guest PostAugust 22, 2010Scienceatmospheric pressure, bi2223, carnegie institution, copper wires, copper-oxygen, crystal, electrical resistance, electricity, geophysical laboratory, Germany, liquid nitrogen boiling point, max plank institute, physics, solid state research, superconductors, three-layered bismuth oxide, transition temperature, viktor struzhkin, xiao-jia chen

Washington, D.C.— Superconductors are more than 150 times more efficient at carrying electricity than copper wires. However, to attain the superconducting state, these materials have to be cooled below an extremely low, so-called transition temperature, at which point normal electrical resistance disappears. Developing superconductors with higher transition temperatures is one of physics’ greatest quests.

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Tag Archives: viktor struzhkin

Under Pressure: Germanium

Delving Into Manganite Conductivity

Roller Coaster Superconductivity Discovered