17 September 2018
The Mermin–Wagner theorem has long told us that in two dimensions a continuous symmetry can be broken, allowing a finite order parameter, only at zero temperature. This rule has now been circumvented.
14 September 2018
The demonstration that applied pressure can substantially change – rather than merely tweak – the properties of a metal–organic quantum magnet indicates a route to designing quantum materials with tailored properties.
31 August 2018
Experiments demonstrating the inversion of entire domain patterns in multiferroic crystals highlight just how versatile this class of materials is, and indicate a route to exploring novel functionalities.
28 May 2018
Using neutron imaging, researchers from PSI, the University of Basel and the company F. Hoffmann-La Roche have found out why proper storage is crucial for syringes pre-filled with a liquid medication.
11 May 2018
The material α−RuCl3
continues to garner attention as the current poster child for realising the Kitaev model. New work places recent experimental observations on a solid theoretical footing, and concludes that the physics of α−RuCl3
is not dominated by Kitaev interactions.
3 May 2018
Numerous intriguing behaviours have been observed already in magnetic materials known as spin ices. But now for the first time direct manifestations of quantum mechanical effects have been seen in such a system.
17 December 2017
Throughout 2017, the material α−RuCl3
has continued to inspire and fascinate those interested in correlated condensed matter. New experimental data now provide unique insight, and pose fresh challenges.
14 November 2017
A laboratory-based search for axion dark matter ended, not unexpectedly, without a discovery. It provides, however, valuable constraints for the properties that these hypothetical particles can have — and thus a guide to where to look next.
23 October 2017
The unexpected finding that in an ‘artificial spin ice’ magnetostatic energy can be transformed into directed rotation of magnetization provides fresh insights into such nano-patterned magnetic structures — and might enable novel applications in nanoscale devices.
21 October 2017
A collaboration between three NUM laboratories has found that magnetic ‘stripe order’ in high-temperature superconductors not only co-exists with superconducting order, but might very well be intimately connected with it.
12 October 2017
A study of how disorder affects a ‘frustrated’ magnet reveals a surprising robustness of the underlying quantum many-body state, and provides evidence for emerging quantum phenomena induced by disorder.
10 October 2017
With PSI's neutron beams, metal objects can be rendered transparent. This helps archaeologists not only to see what is hidden in the hollow spaces of the artefacts — with support from PSI scientists, they can also gain insights into how such ancient artefacts were made and how they can be preserved for posterity.
20 July 2017
A team led by Laura Heyderman has made visible, for the first time, the 3D directions of the magnetisation inside a magnetic object. The smallest details in their visualisation were on the scale of 100 nanometers. Among others, the magnetic structure contained one outstanding kind of pattern: magnetic singularities called Bloch points, which up to now were only known in theory.
17 July 2017
Scientists from PSI and the École polytechnique fédérale de Lausanne (EPFL) have shown experimentally, for the first time, a quantum phase transition in strontium copper borate, the only material to date that realizes the famous Shastry–Sutherland quantum many-body model.
19 May 2017
Among superconducting materials, CeCoIn5
stands out as a rare case where superconductivity gives rise to magnetic order. An international team led by PSI physicist Michel Kenzelmann now reports that when small amounts of impurities are implanted into CeCoIn5
, then two distinct magnetic phases appear — and these are surprisingly similar to one another.
28 April 2017
Quantum phenomena can lead to intriguing effects in materials, but are famously difficult to predict and understand. A combined experimental and theoretical study of a model quantum system provides insight into excitations that involve multiple particles at once.