The group Advanced Thin Film Technology (ATFT) is focused mainly on the development of novel materials and material combinations by modern thin film deposition methods for applications in oxide electronics. We have developed several state-of-the-art and beyond-state-of-art thin film systems: a dedicated and world-wide unique system for ADvanced Oxide Molecular Beam Epitaxy (ADOMBE), a standard oxide MBE, several Pulsed Laser Deposition (PLD) and rf-magnetron sputter chambers. We strive to belong to the world-wide leading groups in oxide thin film technology.
From the viewpoint of materials, we focus on complex functional oxides. The functions we have in mind are (high-temperature) superconductivity, magnetic and ferroelectric properties as well as electrical (magneto-)conductivity. Characterization methods include dedicated thin film diffractometry, Superconducting QUantum Interference Device (SQUID), magnetoconductivity between 300 mK and 400 K in up to 17 T, and high-resolution electron microscopy. We investigate the fundamental materials properties, the effect of multilayer and hybrid systems, interfaces, and novel thin film matter and their functionality in integrated devices such as a tunneling magneto resitance (TMR) junction or a microwave varactor.
- Reactive molecular beam epitaxy (MBE): Our ADOMBE system is the newest generation of MBE for complex oxide materials with up to 10 cations.
- Pulsed Laser Deposition (PLD): Material synthesis of complex oxides and their heterostructures.
- Magnetron sputtering: Growth of functional materials by an industrial standard method
- (High-temperature)Superconductors: Clarification of mechanisms of superconductivity and search for novel superconductors with increased critical temperatures.
- Magnetic materials for spintronics: At the end of the “roadmap” of semiconductor technology spintronics might be a solution. Meanwhile magnetic memory based on TMR is available. But which are the future materials used in these devices?
- Di-/Para-/Ferro-/Piezoelectric materials: Novel “green” and tunable materials for different applications such as piezosensors and microwave components.
- Ion conductors: Which materials allow the development of the ion battery of the future?
- Novel thin film matter: Do you have a good idea which artificial material might have improved functionality? Our systems might be able to grow it!
- Novel interface effects: Even if two materials are well known: At their atomically controlled interface entirely new effects such as the development of a two-dimensional electron gas may happen.