Regensburg 2010 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 9: SC: Poster Session

TT 9.33: Poster

Monday, March 22, 2010, 14:00–18:00, Poster A

Transition to a single-sheet Fermi surface in bulk nickelates and in LaNiO₃/LaAlO₃ Heterostructures — Philipp Hansmann^1,2, •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).