Designing non-equilibrium structure and functionality in complex oxides - Ankit Disa, Max Planck Institute

11.06.2021 14:00 – 14:45

Designing non-equilibrium structure and functionality in complex oxides
Ankit Disa, Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany

Complex oxides exhibit unique macroscopic phenomena with enormous technological potential, ranging from high-temperature superconductivity to colossal magnetoresistance. These properties arise in large part due to the strongly intertwined, or correlated, nature of electrons and the crystal lattice. In this talk, I will discuss two complementary pathways for designing the functionalities of complex, correlated oxides by manipulating their structure at the smallest time and length scales possible.
First, I will describe how the atomically precise control of dimensionality and interfacial structure in oxide heterostructures can be used to tailor their ground state properties. In particular, I will demonstrate the creation of artificial rare-earth nickelate superlattices with tunable orbitals, transport characteristics, and magnetic phases. Second, I will show that resonantly driving phonons with terahertz light pulses also allows one to engineer structural distortions dynamically. This method is applied to induce/enhance features as wide-ranging as ferroelectricty, magnetism, and superconductivity. The level of control in both cases enables the realization of “non-equilibrium” structures, and functional properties beyond what are otherwise achievable in these materials. Together, these approaches provide a toolbox for the design, discovery, and understanding of emergent phenomena in correlated oxides at the picoscale in both space and time.

Lieu

By Zoom Meeting

Organisé par

Section de physique
Département de physique de la matière quantique

Intervenants

Ankit Disa, Max Planck Institute for the Structure and Dynamics of Matter, Germany

entrée libre

Classement

Catégorie: Séminaire