Occurring monthly during the academic year, the 2DCC Webinars present new technical scientific news from within the 2DCC facility and the broader scientific community, as well as, broader topics such as science related to diversity. The webinars are free with an online registration. The slides with voice-over for the 2016 webinars, 2017 webinars, 2018 webinars, 2019 webinars, 2020 webinars , 2021 webinars and 2022 webinars are available by following the links in the menu.

Upcoming 2DCC Webinars: 

Thursday December 15, 2022 from 12-1pm 

Speaker: Dr. Alexander J. Grutter, National Institute of Standards and Technology 

Title:  Understanding Interface Effects in Layered VdW Heterostructures with Neutron Scattering  

Abstract: Layered VdW systems are among the most exciting playgrounds in condensed matter physics and include topological insulators, Weyl and Dirac semimetals, and 2D magnetic systems. In particular, heterostructures incorporating different classes of topological or magnetic orders are promising platforms for next generation quantum and spintronic devices. However, these systems represent a difficult materials engineering challenge in which reactive, easily oxidized materials must coexist across sharp interfaces and preserve the target properties. It is in this context that simultaneous magnetic and structural depth profiling with polarized neutron reflectometry (PNR) has drawn considerable interest. With sub-Ångstrom resolution, sensitivity to magnetic signals originating within a single atomic monolayer, and the ability to detect chemical changes with precision, PNR is a powerful tool for probing low-dimensional nanostructures. In this talk, we will use a series of recent examples to explore the ways in which neutron scattering can be combined with X-ray scattering, spectroscopy, muon spin relaxation spectroscopy, and electron microscopy to accurately identify low-dimensional magnetism, topological spin textures, magnetic proximity effects, and other forms of magnetic interface coupling in systems such as (Bi,Sb)2Te3, MnBi2Te4, CrTe2, and Cd3As2.[1-7] By decomposing the magnetic and electronic properties on a layer-by-layer and element-resolved basis, new quantum material systems may be robustly understood and designed.

References:

  1. C.-Y. Yang et al., Science Advances 6, eaaaz8463 (2020)
  2. W. Yanez et al., Physical Review Applied 16, 054031 (2021)
  3. N. Bhattacharjee et al., Adv. Materials 34, 2108790 (2022)
  4. L. J. Riddiford et al., Phys. Rev. Lett. 128, 126802 (2022)
  5. P. Deng et al., Nano Letters 22, 5735 (2022)
  6. Q. Lu et al., ACS Nano 16, 7580 (2022)
  7. P. Chen et al., Nat. Electronics In Press (2022)

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2DCC Webinars Gallery: 2022 Compilation