Browsing by Author "An, Y"

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    Tetrahedral triple-Q magnetic ordering and large spontaneous hall conductivity in the metallic triangular antiferromagnet Co1/3TaS2
    (Springer Nature, 2023-12-15) Park, P; Cho, W; Kim, C; An, Y; Kang, YG; Avdeev, M; Sibille, R; Iida, K; Kajimoto, R; Lee, KH; Ju, W; Cho, EJ; Noh, HJ; Han, MJ; Zhang, SS; Batista, CD; Park, JG
    The triangular lattice antiferromagnet (TLAF) has been the standard paradigm of frustrated magnetism for several decades. The most common magnetic ordering in insulating TLAFs is the 120° structure. However, a new triple-Q chiral ordering can emerge in metallic TLAFs, representing the short wavelength limit of magnetic skyrmion crystals. We report the metallic TLAF Co1/3TaS2 as the first example of tetrahedral triple-Q magnetic ordering with the associated topological Hall effect (non-zero σxy(H = 0)). We also present a theoretical framework that describes the emergence of this magnetic ground state, which is further supported by the electronic structure measured by angle-resolved photoemission spectroscopy. Additionally, our measurements of the inelastic neutron scattering cross section are consistent with the calculated dynamical structure factor of the tetrahedral triple-Q state. © 2024 Springer Nature Limited.