News at PQM

A ‘fast lane’ for electrons<br /> 

The study of ultra-pure materials still has many ways to surprise and delight! For delafossite metals it was shown that wires sculpted from the same single crystal have very different resistivities depending on the angle at which they are cut.  From the fundamental physics point of view, the laws of bulk resistivity are being broken.

Marie Skłodowska-Curie Fellowship for Mário Moda Piva<br /> 

Warmest congratulations to Mário Moda Piva, who has been awarded a Marie Skłodowska-Curie Individual Fellowship. more

Simplified representation of a quadrupole density wave

The unconventional superconductor CeRh2As2 may host a “quadrupole density wave” - a theorized complex ordering pattern among free electrons that has not yet been observed. more

Discovery of two-phase superconductivity in CeRh<sub>2</sub>As<sub>2</sub>

The phenomenon of superconductivity, providing current transmission without dissipation and a host of unique magnetic properties arising from macroscopic quantum coherence, was first discovered over a century ago. It was not understood until 1957, after which it quickly became clear that superconductors could in principle exist with a wide variety of the fundamental characteristic often referred to as the order parameter. Until the late 1970’s, however, all superconductors found experimentally had the same class of order parameter. more

Unconventional order in a low-dimensional magnet

The analogy between the behaviour of different quantum particles which have the same quantum nature is one of the most fascinating aspects of science. A simple but prominent example is the analogy between the behaviour of electrons (fermions) in a one-dimensional metal and spinons (fermions) in a one-dimensional quantum magnet. But, what are spinons? more

Otto-Hahn-Medaille for Maja Bachmann

Maja Bachmann of the Physics of Quantum Materials department has been awarded the Otto-Hahn-Medaille of the Max Planck Society for her outstanding doctoral research. more

Spontaneous superconducting currents in Sr<sub>2</sub>RuO<sub>4</sub>

Researchers at MPI-CPfS have shown, through muon implantation experiments, that in Sr2RuO4 the onset of superconductivity causes spontaneous electrical currents to flow. They did this by showing that the onset of these currents splits from the main superconducting transition under uniaxial stress, which proves that it is a distinct transition, not a measurement artefact. more

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