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| CODEX / NEWSLETTER BLOG #18 / MARS 2020 |
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| If you want to catch more light, twist it |
A special class of materials known as “Weyl semimetals” have unusual physical properties. In these materials, researchers can separate electrons by their “handedness.” That’s whether the electrons’ magnetic moment is in the same direction as the electrons’ movement or the opposite direction.
This results in a host of unique phenomena that researchers can use to turn infrared light into electricity and develop very fast electronic circuits. |
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| The importance of a Sapphire viewport in a HV or UHV |
| t is vital for the procedure in-situ to be observed in many high vacuum and ultra-high vacuum (HV/UHV) processes. The challenge is that any optical component must penetrate the hermetically sealed chamber but not compromise the quality of the vacuum. |
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| 2D materials from layered van der Waals (vdW) crystals |
Scientists develop new method to isolate atomic sheets and create new materials
Two-dimensional materials from layered van der Waals (vdW) crystals hold great promise for electronic, optoelectronic, and quantum devices, but making/manufacturing them has been limited by the lack of high-throughput techniques for exfoliating single-crystal monolayers with sufficient size and high quality.
Columbia University researchers report in Science (« Disassembling 2D van der Waals crystals into macroscopic monolayers and reassembling into artificial lattices ») that they have invented a new method... |
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| Stretched to the limit and sparkling on curved surfaces |
Two-dimensional (2D) materials could offer new building blocks for future technologies — but only if scientists can control growth and properties. Strain, caused by “stretching” or “bunching” the atomic structure as a crystal grows, is one way to control these properties.
Scientists grew tungsten disulfide 2D crystals over donut shapes. With this approach, they created strain that changed the materials’ growth dynamics... |
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| INTERVIEW / L'ACTUALITÉ DE CODEX INTERNATIONAL |
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| 3 Questions à Maryline Nasr, chef de projet CIBOX au sein du Crismat à Caen |
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Bonjour Maryline, depuis le mois de Janvier 2020 vous êtes chef de projet du programme CIBOX en partenariat entre le laboratoire CRISMAT et CODEX INTERNATIONAL. Pourriez-vous nous rappeler les principaux enjeux de ce programme ? |
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