Leibniz Institute for Crystal Growth

Sub-nanosecond structural dynamics of the martensitic transformation in Ni-Mn-Ga

Abstract Martensitic transformations drive many emerging applications, ranging from actuation and mechanocaloric refrigeration to thermoelastic energy harvesting. All these applications benefit from faster transformations. However, systematic investigations of the fast dynamics a...

Epitaxially Integrated Electro‐Optic KNbO 3 Thin Films on Silicon

ABSTRACT The absence of a native electro‐optic effect in silicon remains a fundamental limitation for integrated photonics, motivating the integration of ferroelectric oxides as active materials. Here, we report the first epitaxial integration of KNbO 3 thin films on silicon, est...

Lattice dynamics and complete polarization analysis of Raman-active modes in LaInO 3

In this study, we present a comprehensive analysis of the Raman-active phonon modes in orthorhombic LaInO 3 based on a combination of polarization-angle resolved Raman spectroscopy and density functional theory calculations. By using backscattering from multiple crystallographic...

Above Room Temperature Ferroelectricity in Epitaxially Strained KTaO 3

ABSTRACT Epitaxial strain is a powerful means to engineer emergent phenomena in thin films and heterostructures. Here, we demonstrate that , a cubic perovskite in bulk form, can be epitaxially strained into a highly tunable ferroelectric. films grown commensurate to (001) substra...