A new form of matter: Excitonium


  • Researchers at the University of Illinois have announced the existence of a new form of matter called excitonium.

  • This material is made up of a kind of boson, a composite particle that could allow the matter to act as a superfluid, superconductor, or even as an insulating electronic crystal.

  • The hole is positively charged and the electron is negatively charged, so it is possible to create a bound state between the two, with the electron orbiting the hole, instead of falling back in. This bound state is the exciton, which is the building block of excitonium.

  • There are five known states of matter: solids, liquids, gases, plasma and Bose-Einstein condensates.

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