The ice giants may hide a layer that behaves like both solid and fluid
Deep inside Neptune and Uranus, matter may enter a new phase📷 AI-generated image / TECH&SPACE
- ★The simulations suggest that at 500 to 3,000 gigapascals, carbon hydride may enter a quasi-one-dimensional superionic phase.
- ★The predicted layer is neither fully solid nor fully liquid, because ions move through a structured lattice.
- ★Such electrical and structural behavior could help explain the unusual magnetic fields of Neptune and Uranus.
According to the source material, deep beneath the swirling blue atmospheres of Neptune and Uranus, conditions become so extreme that matter itself may behave in ways we've never observed before. A team led by Carnegie researchers Cong Liu and Ronald Cohen has used computational simulations to predict the existence of a superionic state of carbon hydride within these ice giants.
Their findings, published in Nature Communications, suggest this exotic phase could be stable at pressures ranging from 500 to 3,000 gigapascals and temperatures between 4,000 and 6,000 Kelvin—conditions far beyond anything found on Earth.
The simulations reveal a quasi-one-dimensional superionic state where atomic motion is restricted in certain dimensions. "This newly predicted carbon–hydrogen phase is particularly striking because the atomic motion is not fully three-dimensional," the researchers note. Carbon and hydrogen, two of the most abundant elements in planetary materials, may combine in unexpected ways under these extreme conditions, challenging our current understanding of planetary interiors.
Computer simulations point to a superionic carbon hydride phase that could help explain the ice giants' odd magnetic fields
A closer scientific visualization of hydrogen ions threading through a rigid carbon scaffold, showing one dominant motion direction rather than a full 3D flow.📷 AI-generated image / TECH&SPACE
The implications of this discovery extend beyond mere scientific curiosity. If confirmed, the presence of superionic carbon hydride could influence how we model the internal dynamics of ice giants, including their magnetic fields and energy redistribution. Neptune and Uranus have long puzzled scientists with their unusual magnetic fields, which are tilted and offset from their planetary centers. A superionic layer could help explain these anomalies by altering the way heat and electrical currents flow within the planets.
However, the findings remain theoretical for now. While computational simulations provide valuable insights, direct experimental confirmation is still lacking. Future research will need to replicate these extreme conditions in laboratory settings or through more advanced observational techniques. As the study of exoplanets continues to grow, understanding the behavior of simple compounds under such pressures could also shed light on the formation and evolution of distant worlds Phys.org.
