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Creators/Authors contains: "Goldberger, Joshua E"

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  1. Free, publicly-accessible full text available March 26, 2025
  2. We establish the synthesis, physical properties, and highly-frustrated magnetism of Mn2In2Se5and Mn2Ga2S5van der Waals crystals.

     
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  3. Abstract

    Two-dimensional (2D) materials have drawn immense interests in scientific and technological communities, owing to their extraordinary properties and their tunability by gating, proximity, strain and external fields. For electronic applications, an ideal 2D material would have high mobility, air stability, sizable band gap, and be compatible with large scale synthesis. Here we demonstrate air stable field effect transistors using atomically thin few-layer PdSe2sheets that are sandwiched between hexagonal BN (hBN), with large saturation current > 350 μA/μm, and high field effect mobilities of ~ 700 and 10,000 cm2/Vs at 300 K and 2 K, respectively. At low temperatures, magnetotransport studies reveal unique octets in quantum oscillations that persist at all densities, arising from 2-fold spin and 4-fold valley degeneracies, which can be broken by in-plane and out-of-plane magnetic fields toward quantum Hall spin and orbital ferromagnetism.

     
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  4. A symmetry-based approach leads to the efficient discovery of magnets hosting topological magnons. 
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