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Helmholtz-Zentrum Dresden-Rossendorf


How to cool more efficiently

Researchers from the University of Barcelona, HZDR, and TU Darmstadt investigate the effects of simultaneously exposing alloys to magnetic fields and mechanical stress. They found that certain materials can boost their cooling efficiency by up to doubling it with commercially available neodymium permanent magnets.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalApplied Physics Reviews·DateDec 3, 2020

Single photons from a silicon chip

Researchers at Helmholtz-Zentrum Dresden-Rossendorf have designed a silicon-based light source to generate single photons, a crucial component for quantum cryptography and communication. The prototype can produce 100,000 single photons per second and is stable even after several days of continuous operation.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalOptics Express·DateSep 15, 2020

A topography of extremes

Scientists successfully combined high pressures, magnetic fields, and ultra-low temperatures to study cer-rhodium-indium-five metal's conducting properties. The resulting phase diagram reveals exciting insights into the mysterious superconductivity of this metal.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalNature Communications·DateAug 27, 2020

Exotic mixtures

Researchers have developed a precise method for evaluating the behavior of mixtures under high pressure using X-ray scattering. The study reveals that hot hydrocarbon mixtures in ice giants can produce diamond rain, which generates an additional energy source.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalNature Communications·DateJun 24, 2020

Seven at one pulse

Researchers at Helmholtz-Zentrum Dresden-Rossendorf have developed a novel material that can increase the frequency of terahertz radiation by a factor of seven, paving the way for potential IT applications. The material, cadmium arsenide, is a three-dimensional Dirac material that enables non-linear frequency conversion.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalNature Communications·DateMay 19, 2020

A closer look at superconductors

A new measuring method called Higgs spectroscopy helps understand the dynamics of paired electrons in superconductors, revealing typical precursors of superconductivity even above the critical temperature. The technique uses a multi-cyclic terahertz pulse to excite Higgs oscillations and measure them precisely.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalNature Communications·DateMay 7, 2020

Broad spectrum

A hybrid material has been developed that can detect a broad range of light wavelengths, from ultraviolet to near infrared, due to its small bandgap. The material's electronic properties were investigated, revealing promising results for optoelectronic applications.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalAdvanced Materials·DateApr 9, 2020

Hermetically sealed semi-conductors

Researchers have developed a new encapsulation technique to protect the electronic properties of sensitive materials like indium selenide and gallium selenide. The method uses hexagonal boron nitride to encase the material, preserving its performance and enabling its integration into electronic components.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalACS Applied Materials & Interfaces·DateJan 29, 2020

Fusion by strong lasers

Researchers investigate possibility of facilitating controlled fusion reactions with assisted tunneling processes using X-ray free electron lasers. Theoretical results show promise for increasing tunneling rate, paving way for successful controlled fusion reaction.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalPhysical Review C·DateDec 5, 2019

Intuitive in the virtual reality

Researchers developed an electronic sensor that can process both touchless and tactile stimuli, enabling seamless interaction in virtual reality scenarios. The sensor's flexibility allows it to register a clear shift from touchless to tactile interaction, allowing for selective control of physical and virtual objects.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalNature Communications·DateOct 29, 2019

Tomorrow's coolants of choice

Researchers at HZDR and TU Darmstadt developed a systematic magnetocaloric material library to assess promising materials for magnetic cooling. The study highlights the need for sustainable access to suitable materials, with iron-rhodium alloys showing potential as alternatives to rare-earth metals like gadolinium.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalAdvanced Energy Materials·DateSep 16, 2019

An astonishing parabola trick

Researchers from Helmholtz-Zentrum Dresden-Rossendorf and Helmholtz-Zentrum Berlin have discovered a unique chiral effect in magnetic materials. The team created parabolic strips of Permalloy, which exhibited a surprisingly strong delayed response to a reversed magnetic field due to curvature-induced chiral properties.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalPhysical Review Letters·DateSep 3, 2019

Reducing water consumption in mining

Researchers at Helmholtz-Zentrum Dresden-Rossendorf have developed a new procedure to optimize water usage in mineral beneficiation technology. By using process simulation, the team was able to significantly reduce water consumption, from 4,000 litres per tonne of ore to below 1,000 litres per tonne. This innovation has the potential t...

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalJournal of Environmental Management·DateMar 28, 2019

Let's not make big waves

A team of researchers has successfully generated ultra-short spin waves in an astoundingly simple material, opening up new possibilities for the development of spintronics. The achievement uses a magnetic material shaped into circular disks to create spin waves with wavelengths as short as 80 nanometers.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalPhysical Review Letters·DateMar 27, 2019

Mini-detectors for the gigantic?

Researchers from HZDR found that Bose-Einstein condensates, which can be thought of as heavily diluted vapor from individual atoms cooled to extreme temperatures, are not sensitive enough to detect gravitational waves. The team discovered that the power of these gravitational waves is too weak to be measured using current methods.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalPhysical Review D·DateDec 12, 2018

In Neptune, it's raining diamonds

Scientists at Helmholtz-Zentrum Dresden-Rossendorf simulated the conditions inside Neptune and found diamonds forming in real time using an ultra-strong X-ray laser. The study provides insights into the planet's chemical makeup and has potential applications for electronic instruments, medical procedures, and industrial production.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalNature Astronomy·DateAug 21, 2017

Three magnetic states for each hole

Researchers at Helmholtz-Zentrum Dresden-Rossendorf have developed cobalt grids that can be reliably programmed at room temperature. Three distinct magnetic states, denoted as G, C, and Q, were found around each hole in the grid. This discovery could lead to more efficient computing using spin-waves instead of electric current.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalScientific Reports·DateFeb 2, 2017

Random access memory on a low energy diet

Researchers from Dresden and Basel have developed a novel memory chip concept that can store data magnetically without continuous refreshing, reducing energy consumption and heat generation. The breakthrough uses an electrical voltage instead of current to activate the magnetic material, enabling more efficient data storage.

SourceHelmholtz-Zentrum Dresden-Rossendorf·JournalNature Communications·DateJan 3, 2017