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, 2022 webinars and 2023 webinars are available by following the links in the menu.
Upcoming 2DCC Webinars:
Thursday March 30, 2023 from 12-1pm
Speaker: Dr. Xianglin Ke, Michigan State University
Title: Thermal Hall effect in insulating van der Waals magnets
Abstract:
Thermal transport is also an important technique for studying low-energy excitations of quantum materials. Specifically, there has been considerable interest in using thermal transport measurements on insulating solids to probe their charge-neutral quasi-particles, i.e., magnons and phonons. In this talk, we will present our recent thermal transport studies on insulating van der Waals (vdW) magnets, focusing on ferromagnetic VI3. We show that this material exhibits an anomalous thermal Hall effect with large thermal Hall signal over a wide temperature region. The thermal Hall signal persists in the absence of an external magnetic field and flips sign upon the switching of the magnetization. The observed thermal Hall effect is of dual nature, dominated by topological magnons hosted by the ferromagnetic honeycomb lattice at higher temperatures while being driven by magnon polarons via magnon-phonon coupling at lower temperatures. If time permits, we will also present some new thermal transport studies on other 2D vdW magnets [2].
References
[1] H. Zhang et al., Physical Review Letters 127, 247202 (2021).
[2] C.Q. Xu et al, Physical Review B 107, L060404 (2023).
On University Park campus?
Attend in person in the Millennium Science Complex N-201
