Friends and Collaborators
Our work is made more productive and fruitful by a number of strong collaborations. The following is a list of some of our major local, national, and global collaborators.
This area of research aims to illuminate one of the most underdeveloped realms of solid state materials science – the physics and control of thermal effects in materials with ferroic order. This work focuses on the development of materials and know-how to enable pyroelectric energy conversion of waste heat to electrical energy, electrocaloric solid state cooling, thermally-driven electron emission, and much more. Our comprehensive approach includes aspects of materials design, synthesis, device fabrication, and advanced characterization development and utilization. Recent work in this regard has provided understanding about the role of domain walls in pyroelectric response, produced novel methods for studying heat-based effects in ferroic thin-film capacitors, and demonstrated colossal energy conversion processes in materials.
Driven by recent advances in the production of high-quality thin films of complex-oxide materials, great attention has been given to the use of such approaches to generate new function. As part of this work we explore the use of epitaxial strain, superlattice and artificial heterostructures, compositional and strain gradients, and much more to produce physical effects not expected from classical understanding of materials. Our comprehensive approach includes aspects of materials design, synthesis, device fabrication, and advanced characterization development and utilization. Recent work in this regard has demonstrated emergent magnetism at interfaces, the evolution of polar vortex structures in superlattices, polarization gradients in compositionally-graded films, multi-state switching in ferroelectrics, and much more.
To elicit the properties one desires from materials requires precise control of the nature of that material. This area of research aims to provide unprecedented control of complex materials – including shining light on the coupling between material chemistry and defects with epitaxial strain and material properties. The goal is to develop pathways to manipulate and control materials such that designer structures and properties can be produced. Our comprehensive approach includes aspects of materials design, synthesis, device fabrication, and advanced characterization development and utilization. Recent work in this regard has highlighted the intimate connection of material chemistry to the evolution of electronic, thermal, optical, dielectric, ferroelectric, etc. properties, has demonstrated defect-based routes to enhance ordering temperatures and stability of materials, has illuminated both in situ during growth and ex situ processing approaches to deterministically produce specific defect structures that can improve material properties, and has explored routes to characterize such effects in materials.
Magneto-Electro-Thermal Effects in Materials
Emergent Phenomena in Materials
Fundamental Control of Materials
UC Berkeley & LBNL
Around the country and the world