Regensburg 2010 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 9: SC: Poster Session
TT 9.33: Poster
Montag, 22. März 2010, 14:00–18:00, Poster A
Transition to a single-sheet Fermi surface in bulk nickelates and in LaNiO3/LaAlO3 Heterostructures — Philipp Hansmann1,2, •Alessandro Toschi1, Xiaoping Yang2, Giniyat Khaliullin2, Ryotaro Arita3, Ole K. Andersen2, and Karsten Held1 — 1Institute of Solid State Physics, Vienna University of Technology — 2Max Planck Institute for Solid State Research, Stuttgart — 3Department of Applied Physics, Universtity of Tokyo
The possibility of finding bulk nickelates with an electronic structure analogous to that of high temperature cuprate superconductors was considered a while ago [1]. For the systems available at that time the results were not encouraging so the idea was discarded. However, nowadays, due to new experimental techniques, heterostructures can be engineered offering new possibilities for actual material design. Using the local density approximation and its combination with dynamical mean field theory (LDA+DMFT), we compare the transition to a single sheet (cuprate-like) Fermi surface induced by the strong electronic correlation in bulk nickelates and in LaNiO3/LaAlO3 Heterostructures [2].
[1] V.I. Anisimov et al., Phys. Rev.B 59, 7901 (1999).
[2] P. Hansmann et al., Phys. Rev. Lett. 103, 016401 (2009).