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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…)

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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Under Pressure: Germanium

Roller Coaster Superconductivity Discovered