Events

27 April

Electronic properties of SmNiO3 and NdNiO3 thin films

Thursday 27 April 2017, 03:30pm

ICN2 Seminar Hall, ICN2 Building, UAB

Sara Catalano - Department of Quantum Matter Physics, Universite de Geneve, Switzerland 

Hosted by: ICREA Prof. Gustau Catalán - Oxide Nanophysics Group Leader at ICN2 

Short Abstract: 

Among the family of transition metal oxides (TMO), the perovskite nickelates (RE-NiO3, RE = Rare Earth) stand out for their rich phase diagram, yielding the transition from a Fermi liquid high temperature phase to a charge and magnetically ordered ground state at low temperature. The occurring of the transition can be tuned by a wide spectrum of tools, such as cation substitution, epitaxial strain, electric field effect, optical excitation in the infrared range and pressure, making the RE-NiO3 ideal candidates for the development of novel TMO-based electronic devices. Furthermore, they provide an excellent playground for achieving a deeper understanding of correlated behavior in many-body systems.

Here, I will present an overview of the structural, transport and magnetic properties of high quality epitaxial thin films of SmNiO3 and NdNiO3 deposited on top of a variety of perovskite substrates. In particular, I will illustrate how both the in-plane film/substrate lattice mismatch and the selection of specific crystallographic directions for the film growth allow for an exceptional tuning of the electronic phases of these compounds[1][2]. Moreover, I will show an in-depth analysis of the RE-NiO3 ground state performed with Resonant Inelastic X-Ray Scattering (RIXS) spectroscopy, providing key information on the electronic configuration of these materials[3].

[1] S. Catalano, M. Gibert, V. Bisogni, O. E. Peil, F. He, R. Sutarto, M. Viret, P. Zubko, R. Scherwitzl, A. Georges, G. A. Sawatzky, T. Schmitt and J.-M. Triscone, APL Materials 2, 116110 (2014).

[2] S. Catalano, M. Gibert, V. Bisogni, F. He, R. Sutarto, M. Viret, P. Zubko, R. Scherwitzl, G. A. Sawatzky, T. Schmitt and J.-M. Triscone, APL Materials 3, 062506 (2015).

[3] V. Bisogni, S. Catalano, R. J. Green, M. Gibert, R. Scherwitzl, Y. Huang, V. N. Strocov, P. Zubko, S. Balandeh, J.-M. Triscone, G. Sawatzky & T. Schmitt, Nature Communications 7, 13017 (2016).