Publications (8)
Photoinduced Domain Pattern Transformation in Ferroelectric/Dielectric Superlattices
Youngjun Ahn, Joonkyu Park, Anastasios Pateras +7
The nanodomain pattern in ferroelectric/dielectric superlattices transforms to a uniform polarization state under above-bandgap optical excitation. X-ray scattering reveals a disap…
Mesoscopic Elastic Distortions in GaAs Quantum Dot Heterostructures
Anastasios Pateras, Joonkyu Park, Youngjun Ahn +9
Quantum devices formed in high-electron-mobility semiconductor heterostructures provide a route through which quantum mechanical effects can be exploited on length scales accessibl…
Role of temperature-dependent electron trapping dynamics in the optically driven nanodomain transformation in a PbTiO/SrTiO superlattice
Joonkyu Park, Youngjun Ahn, Jack A. Tilka +6
The spontaneously formed striped polarization nanodomain configuration of a PbTiO/SrTiO superlattice transforms to a uniform polarization state under above-bandgap illu…
General approaches for shear-correcting coordinate transformations in Bragg coherent diffraction imaging: Part 2
Peng Li, Siddharth Maddali, Anastasios Pateras +4
X-ray Bragg coherent diffraction imaging has been demonstrated as a powerful three-dimensional (3D) microscopy approach for the investigation of sub-micrometer-scale crystalline pa…
Nanosecond Optically Induced Phase Transformation in Compressively Strained BiFeO3 on LaAlO3
Youngjun Ahn, Anastasios Pateras, Samuel D. Marks +9
Above-bandgap optical illumination induces a transformation from tilted tetragonal-like (T-like) and rhombohedral-like (R-like) phases to an untilted T-like phase in compressively…
Combining Laue diffraction with Bragg coherent diffraction imaging at 34-ID-C
Anastasios Pateras, Ross Harder, Wonsuk Cha +10
Measurement modalities in Bragg coherent diffraction imaging (BCDI) rely on finding signal from a single nanoscale crystal object, which satisfies the Bragg condition among a large…