National University of Singapore
DESIGN AND SYNTHESIS OF FERROIC HYBRID ORGANIC-INORGANIC PEROVSKITES
Abstract
dc:description.abstractHybrid organic–inorganic perovskites afford highly versatile lattice dimensionalities, establishing them as novel material paradigms for the tailoring of ferroic behaviors. This flexibility allows for the modification of symmetry through lattice distortion or chirality transfer, thereby enabling the coexistence of diverse ferroic behaviors. However, the design principles for engineering one or multiple ferroic orders and their cross-coupling mechanism remain less understood. This thesis presents a comprehensive study on the design principles of ferroic perovskite single crystals, especially focusing on three pivotal factors influencing their intrinsic ferroic properties: lattice dimensionality, mechanical strain, and chirality transfer. We provide experimental evidence for the coexistence of chirality, ferroelectric, and magnetic orders in perovskites, and theoretically elaborate their cross-coupling mechanism by defining a pseudo-scalar descriptor. This thesis provides an in-depth understanding of the principles and mechanisms of ferroic properties in perovskites, highlighting their promise for applications in non-volatile storage and multilevel spintronic devices.
Author and committee
dc:creator, dc:contributor.*- Author dc:creator
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- ZHENG HAINING