Theory reveals the nature of silicon carbide crystals defects

Imperfections of crystal structure, especially edge dislocations of an elongated nature, deeply modify basic properties of the entire material and, in consequence, drastically limit its applications. Using silicon carbide ...

A milestone in petahertz electronics

In a semiconductor, electrons can be excited by absorbing laser light. Advances in the past decade have enabled measuring this fundamental physical mechanism on timescales below a femtosecond (10-15 s). Now, physicists at ...

UV light improves smartphone cameras

Photodetectors, which are used in a wide range of systems and devices from smartphones to space stations, are typically only sensitive to light within a certain narrow bandwidth. This presents numerous challenges to product ...

A new approach to building efficient thermoelectric nanomaterials

By doping a thermoelectric material with minute amounts of sulfur, a team of researchers has found a new path to large improvements in the efficiency of materials for solid-state heating and cooling and waste energy recapture. ...

Graphene isn't the only Lego in the materials-science toy box

You may have heard of graphene, a sheet of pure carbon, one atom thick, that's all the rage in materials-science circles, and getting plenty of media hype as well. Reports have trumpeted graphene as an ultra-thin, super-strong, ...

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