@article{BareilleFortunaRoedeletal.2014,
  author    = {Bareille, C. and Fortuna, F. and R{\"o}del, T. C. and Bertran, F. and Gabay, M. and Hijano Cubelos, O. and Taleb-Ibrahimi, A. and Le F{\`e}vre, P. and Bibes, M. and Barthelemy, A. and Maroutian, T. and Lecoeur, P. and Rozenberg, M. J. and Santander-Syro, A. F.},
  title     = {Two-dimensional electron gas with six-fold symmetry at the (111) surface of KTaO3},
  series = {Scientific Reports},
  volume    = {4},
  journal   = {Scientific Reports},
  issn      = {2045-2322},
  doi       = {10.1038/srep03586},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-117703},
  pages     = {3586},
  year      = {2014},
  abstract  = {Two-dimensional electron gases (2DEGs) at transition-metal oxide (TMO) interfaces, and boundary states in topological insulators, are being intensively investigated. The former system harbors superconductivity, large magneto-resistance, and ferromagnetism. In the latter, honeycomb-lattice geometry plus bulk spin-orbit interactions lead to topologically protected spin-polarized bands. 2DEGs in TMOs with a honeycomb-like structure could yield new states of matter, but they had not been experimentally realized, yet. We successfully created a 2DEG at the (111) surface of KTaO3, a strong insulator with large spin-orbit coupling. Its confined states form a network of weakly-dispersing electronic gutters with 6-fold symmetry, a topology novel to all known oxide-based 2DEGs. If those pertain to just one Ta-(111) bilayer, model calculations predict that it can be a topological metal. Our findings demonstrate that completely new electronic states, with symmetries not realized in the bulk, can be tailored in oxide surfaces, promising for TMO-based devices.},
  language  = {en}
}