TY - JOUR
KW - Ferroelectric materials
KW - Lead titanate
KW - Vortex flow
KW - Degrees of freedom (mechanics)
KW - Strontium titanates
KW - Emergent phenomenon
KW - Oxide superlattices
KW - Topology
KW - Complex oxides
KW - Complex phase diagrams
KW - Epitaxial strain
KW - Interfacial couplings
KW - Parent materials
KW - States of matter
AU - S Das
AU - A Ghosh
AU - M.R McCarter
AU - S.-L Hsu
AU - Y.-L Tang
AU - A.R Damodaran
AU - Ramamoorthy Ramesh
AU - L.W Martin
AB - The ability to synthesize high-quality, complex-oxide heterostructures has created a veritable playground in which to explore emergent phenomena and exotic phases which arise from the interplay of spin, charge, orbital, and lattice degrees of freedom. Of particular interest is the creation of artificial heterostructures and superlattices built from two or more materials. Through such approaches, it is possible to observe new phases and phenomena that are not present in the parent materials alone. This is especially true in ferroelectric materials where the appropriate choice of superlattice constituents can lead to structures with complex phase diagrams and rich physics. In this article, we review and explore future directions in such ferroic superlattices wherein recent studies have revealed complex emergent polarization topologies, novel states of matter, and intriguing properties that arise from our ability to manipulate materials with epitaxial strain, interfacial coupling and interactions, size effects, and more. We focus our attention on recent work in (PbTiO3)n/(SrTiO3)n superlattices wherein exotic polar-vortex structures have been observed. We review the history of these observations and highlights of recent studies and conclude with an overview and prospectus of how the field may evolve in the coming years. © 2018 Author(s).
BT - APL Materials
DO - 10.1063/1.5046100
LA - eng
M1 - 10
N1 - cited By 6
N2 - The ability to synthesize high-quality, complex-oxide heterostructures has created a veritable playground in which to explore emergent phenomena and exotic phases which arise from the interplay of spin, charge, orbital, and lattice degrees of freedom. Of particular interest is the creation of artificial heterostructures and superlattices built from two or more materials. Through such approaches, it is possible to observe new phases and phenomena that are not present in the parent materials alone. This is especially true in ferroelectric materials where the appropriate choice of superlattice constituents can lead to structures with complex phase diagrams and rich physics. In this article, we review and explore future directions in such ferroic superlattices wherein recent studies have revealed complex emergent polarization topologies, novel states of matter, and intriguing properties that arise from our ability to manipulate materials with epitaxial strain, interfacial coupling and interactions, size effects, and more. We focus our attention on recent work in (PbTiO3)n/(SrTiO3)n superlattices wherein exotic polar-vortex structures have been observed. We review the history of these observations and highlights of recent studies and conclude with an overview and prospectus of how the field may evolve in the coming years. © 2018 Author(s).
PB - American Institute of Physics Inc.
PY - 2018
T2 - APL Materials
TI - Perspective: Emergent topologies in oxide superlattices
VL - 6
SN - 2166532X
ER -