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Space & Cosmos
Oldest direct evidence of hydrothermal activity on Mars discovered
A sample of the Martian meteorite known as Black Beauty. Credit: Curtin University/Aaron Kabosie New Curtin University-led research uncovers what may be the oldest direct evidence of ancient hydrothermal activity on Mars, revealing the planet may have been habitable at some point in its past It became. The study analyzed 4.45 billion-year-old zircon particles from the famous Martian meteorite NWA7034,…
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Nanotechnology
Due to the action of light, pure silicon changes from an indirect bandgap semiconductor to a direct bandgap semiconductor.
Credit: ACS Nano (2024). DOI: 10.1021/acsnano.4c02656 Research led by the University of California, Irvine has found that the optical properties of materials can be dramatically improved by imparting new properties to light, rather than changing the material itself. The researchers have demonstrated that by manipulating the momentum of incoming photons, they can fundamentally change the way light interacts with matter.…
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Physics
Direct generation of spin current using ultrashort laser pulses
Experimental schematic and static characteristics. Source: Physical Review Letters (2024). DOI: 10.1103/PhysRevLett.133.106902 An international team of physicists has discovered that they can directly generate spin current using a specific type of ultrashort laser pulse. In a study published in the journal Physical Review Letters, the team generated the spin current using linearly polarized laser pulses and a circularly polarized probe…
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