@article{403,
  keywords = {non-Palaiseau, paper},
  author = {Matteo Gatti and Tokatly IV and Angel Rubio},
  title = {Sodium: A Charge-Transfer Insulator at High Pressures},
  abstract = {By first-principles methods we analyze the optical response of transparent dense sodium as a function of applied pressure. We discover an unusual kind of charge-transfer exciton that proceeds from the interstitial distribution of valence electrons. The absorption spectrum is strongly anisotropic, which, just at pressures above the metal-insulator transition, manifests as sodium being optically transparent in one direction but reflective in the other. This result provides key information about the crystal structure of transparent sodium, a new unconventional inorganic electride.},
  year = {2010},
  journal = {Physical Review Letters},
  volume = {104},
  pages = {216404},
  month = {2010/May//},
  publisher = {American Physical Society},
  url = {http://dx.doi.org/10.1103/PhysRevLett.104.216404},
}