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Make plans to join us for an upcoming Physical Review Journal Club at 11:00 a.m. ET Thursday, January 25. Drs. Sam Lambrick (Cambridge University, UK) and Matthew Bergin (University of Newcastle, Australia) will sit down with the Physical Review Journal Club to discuss their recently published research, "2D Helium Atom Diffraction from a Microscopic Spot." Following their presentation, both authors will participate in a Q&A session with participants.
Per the paper's abstract: "A method for measuring helium atom diffraction with micron-scale spatial resolution is demonstrated in a scanning helium microscope (SHeM) and applied to study a micron-scale spot on the (100) plane of a lithium fluoride (LiF) crystal. The positions of the observed diffraction peaks provide an accurate measurement of the local lattice spacing, while a combination of close-coupled scattering calculations and Monte Carlo ray-tracing simulations reproduce the main variations in diffracted intensity. Subsequently, the diffraction results are used to enhance image contrast by measuring at different points in reciprocal space. The results open up the possibility for using helium microdiffraction to characterize the morphology of delicate or electron-sensitive materials on small scales. These include many fundamentally and technologically important samples which cannot be studied in conventional atom scattering instruments, such as small grain size exfoliated 2D materials, polycrystalline samples, and other surfaces that do not exhibit long-range order."
You can explore this topic further by reading a viewpoint of the research from Physics Magazine.
Come with questions and be ready to learn more about atom-diffraction imaging. | Presenters:
Sam Lambrick (Cambridge University, UK)
Matthew Bergin (University of Newcastle, Australia)
Read ahead in Physical Review Letters:
2D Helium Atom Diffraction from a Microscopic Spot
Nick A. von Jeinsen, Sam M. Lambrick, Matthew Bergin, Aleksandar Radić, Boyao Liu, Dan Seremet, Andrew P. Jardine, and David J. Ward
Phys. Rev. Lett. 131, 236202
This session will be moderated by:
Prof. Philippe Roncin (University of Paris-Saclay, Orsay, France)
About the Physical Review Journal Club:
Physical Review Journal Club meetings enable participants to meet leaders in the field of physics, and delve into the latest published research. Each one-hour Journal Club meeting includes a presentation followed by moderated Q&A time with the participating researcher(s). This free, open-to-all online series offers a rare opportunity to engage with the authors of key scientific developments in a friendly, "Ask Me Anything" format. | | | |
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