Research at extreme sample conditions at the HLD

Dr Thomas Herrmannsdörfer, Head of High Magnetic Field Laboratory, Helmholtz-Zentrum Dresden-Rossendorf

The Dresden High Magnetic Field Laboratory (HLD) is a user facility which provides external and in-house researchers with possibility to perform challenging experiments at extreme sample conditions, such as fields up to about 100 T. The HLD is continuously engaged in the development of novel magnets and experimental techniques which are specifically adapted for the use at highest magnetic fields and in a broad temperature range down to millikelvin temperatures. The HLD focuses on modern materials research. In particular, quantum condensed matter with novel electronic or magnetic properties is our central research area. As a science example for this talk, we present magnetization data of spin ice compounds (e.g.  Ho2Ti2O7) taken at very low temperatures and fields up to the feasibility limits.

Electrical characterization of nanoscale 1d and 2d conductors

Dr Arthur Erbe, Head of Transport in Nanostructures / Device Processing / NanoNet, Helmholtz-Zentrum Dresden-Rossendorf

Here we present electrical measurements on 1d nanowires and 2d semiconductors, which are performed at various temperatures in order to identify the charge transport mechanisms in these structures. Hall measurements are used to characterize the charge density of the materials at different temperatures. We also show how the influence of thermal vibrations can be used to determine the nature of the charge transport.

The superconductivity of Sr2RuO4 under uniaxial stress

Dr Clifford Hicks, Group leader – Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Dresden

The unconventional metal Sr2RuO4 is one of the most intensively studied materials in condensed matter physics. And yet, in spite of extraordinarily detailed knowledge about its normal state, the origin of its superconductivity remains unknown, which represents a major challenge to theories of unconventional superconductivity. Very substantial progress has been made in recent years however through the introduction of piezoelectric-driven uniaxial stress apparatus. Using this tool, the lattice can be continuously distorted, allowing study not just of the unstressed system but a continuously-connected set of closely related compounds. We have achieved elastic compressions of almost 2%. At 0.4% compression, one of the Fermi surfaces of Sr2RuO4 undergoes a topological transition, which results in a dramatic enhancement of the superconductivity.

Quantum computing and qubit scale-up applications with Proteox

James Robinson, Product Manager, Oxford Instruments

This webinar provides an overview of the new Proteox dilution refrigerator from Oxford Instruments, highlighting the key features and suitability for many quantum computing and qubit scale-up applications. The Proteox system is an essential tool for low temperature researchers, providing advanced research capability. It enables a step change in Cryofree system modularity, designed for enhanced adaptability, reliability and increased experimental capacity. If you are dealing with low temperature experiments, don’t miss this webinar.