Excitation of molecules by light irradiation triggers various important processes including luminescence, photovoltaic effect and photochemical reactions, and detailed understanding of the molecular excited states is crucial to improve organic opto-electronic devices. Absorption spectroscopy is a powerful tool to describe the molecular excitations and the combination with emission...
Interfacing materials results a wealth of emergent physical properties that can be exploited for new functionalities of the coupled sample. This contribution will concentrate on the interfaces of two ferroic materials such as ferroelectric/ferromagnetic/or ferroelastic compounds. Thereby, the ferroic order itself can be an emergent one due to interfacial proximity effects. After a...
Conventional materials have magnetoresistances $\Delta R/R=[R(B)-R(0)]/R(0)$ of a few percent, and the giant magnetoresistance of metal heterostructures approaches 30% for dc fields and at THz frequencies [1]. In contrast, in colossal magnetoresistance (CMR) oxides the resistance can change by orders of magnitude in a magnetic field. Here we report for the first time that colossal...