High Pressure, Matter at Extreme States

Lab-based mimicry allowed an international team of physicists including the Geophysical Laboratory’s Alexander Goncharov to probe hydrogen under the conditions found in the interiors of giant planets—where experts believe it gets squeezed until it becomes a liquid metal, capable of conducting electricity. Their work is published in Science.

Geochemistry, Matter at Extreme States, Mineralogy

Blue diamonds—like the world-famous Hope Diamond at the National Museum of Natural History—formed up to four times deeper in the Earth’s mantle than most other diamonds, according to new work by Carnegie’s Steven Shirey, Emma Bullock, and Jianhua Wang and published on the cover of Nature.

High Pressure, Matter at Extreme States

Irina Chuvashova joins the Geophysical Laboratory as a postdoctoral associate, previously from LSPM-CNRS Universite Paris Nord.  She is working with Alex Goncharov on high-pressure investigations of transport and elastic properties of the Earth's minerals.  Additionally, she is interested in sintering materials with different defined properties using various methods, especially high pressure and analytical techniques.

High Pressure, Materials, Matter at Extreme States

New work from a team led by the Geophysical Laboratory’s Alexander Goncharov confirms that nitrogen, the dominant gas in Earth’s atmosphere, becomes a metallic fluid when subjected to the extreme pressure and temperature conditions found deep inside the Earth and other planets. Their findings are published by Nature Communications.

High Pressure, Materials, Matter at Extreme States

The Geophysical Laboratory's Jianjun Ying and Viktor Struzhkin are part of a team that have found an unusual pressure induced PLD in a TMDs-related material SnSe2. Their work is published in Physical Review Letters.

Matter at Extreme States

The Geophysical Laboratory's weekly seminar series continues with Maosheng Miao of California State University, Northridge.  He will present, "Chemical trends of elements under pressure and their effects to the form and properties of materials."

The Geophysical Laboratory's Jinanjun Ying and Viktor Struzhkin were part of a team that has recently reported a superconducting state in a honeycomb lattice of iron atoms, which opens up a new structural playground for iron-based superconductivity. So far, all iron-based superconductors structurally adopt FeSe-type layers with a square iron(II) lattice.

High Pressure, Materials, Matter at Extreme States

The Geophysical Laboratory's weekly seminar series continues with Leonid Dubrovinsky of the University of Bayreuth. He will present, "High-Pressure High-Temperature Single Crystal Structural Studies at Multimegabar Pressures."

Geochemistry, High Pressure, Matter at Extreme States

Michael Walter is the Director of the Geophysical Laboratory. Walter’s research focuses on the differentiation of the mantle and core, mantle melting and element partitioning, subsolidus phase relations and crystal chemistry, and the origin of deep mantle diamonds and their inclusions.

High Pressure, Materials, Matter at Extreme States

The Geophysical Laboratory’s Tim Strobel and Venkata Bhadram now report unexpected quantum behavior of hydrogen molecules, H2, trapped within tiny cages made of organic molecules, demonstrating that the structure of the cage influences the behavior of the molecule imprisoned inside it.

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