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Showing 1–6 of 6 results
Advanced filters: Author: Jeongheon Choe Clear advanced filters

  • Antiferromagnets have a variety of attractive features for spintronic devices; they are inherently robust against external magnetic fields, and have fast, terahertz, dynamics. However, terahertz magnons are usually strongly damped. Here, Choe, Lujan and coauthors find that the zone boundary magnons in the AFM insulator CoTiO3 exhibit long lifetimes.

    • Jeongheon Choe
    • David Lujan
    • Xiaoqin Li
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-9

  • Understanding the structural changes in disordered non-equilibrium materials is important for their processing, yet it remains experimentally challenging to follow the dynamics. Here, Choe et al. image the first-order like transition from crystal to liquid in a model molecular system adsorbed on graphene by tracking individual molecules in real time.

    • Jeongheon Choe
    • Yangjin Lee
    • Kwanpyo Kim
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-7

  • MnBi2Te4, referred to as MBT, is a van der Waals material combining topological electron bands with magnetic order. Here, Lujan et al study collective spin excitations in MBT, and show that magnetic fluctuations increase as samples reduce in thickness, implying less robust magnetic order.

    • David Lujan
    • Jeongheon Choe
    • Xiaoqin Li
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-7

  • Transient optical spectroscopy applied to studying twisted MoTe2 for time-domain detection of fractional fillings of Chern bands reveals many hidden states that have not been previously observed and which could host exotic topological phases.

    • Yiping Wang
    • Jeongheon Choe
    • X.-Y. Zhu
    Research
    Nature
    Volume: 641, P: 1149-1155

  • The emergence of magnetically confined surface excitons enabled by antiferromagnetic spin correlations is reported, which leads to the confinement of excitons to the surface of layered antiferromagnet CrSBr.

    • Yinming Shao
    • Florian Dirnberger
    • D. N. Basov
    Research
    Nature Materials
    Volume: 24, P: 391-398