Our first paper is online!

We have recently posted the very first manuscript of our research group on the arXiv!

We have studied the superconducting order parameter of high-entropy alloys (HEA). These alloys are a new material class, in which five or more chemical elements randomly arrange on simple cubic lattices. Typical for alloys, these materials exhibit superior mechanical and thermal properties. A subset of these compounds enters a superconducting state at low temperatures, which raises hopes for their application in superconducting magnet technology, e.g., for fusion reactors, or quantum information applications. Despite an increasing number of superconducting HEAs, little is known about the superconducting state itself. We set out to change that! Using magnetisation measurements, we show that the prototypical TaNbHfZrTi HEAs are isotropic single-band s-wave superconductors that can be perfectly described by BCS theory. We can also show that the superconducting state is insensitive to the significant amount of microscopic disorder in these materials.

Interested? Read more. Kudos to our undergraduate student Casey who has spent his entire summer break on running the measurements for this project.