ChakhalianProf. Jak Chakhalian's group has used "atomic engineering" to realize a room temperature two-dimensional polar metal in superlattices of BaTiO3/SrTiO3/LaTiO3. Polar metallic oxides, which sometimes are called "ferroelectric metals", are commonly defined by the coexistence of polar crystal structure and metallicity and were thought to be nonexistent. This new development provides a route to creating exotic quantum states including coexisting ferroelectric, ferromagnetic, and superconducting phases.

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