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  1. Article

    Open Access

    Large anomalous Hall conductivity induced by spin chirality fluctuation in an ultraclean frustrated antiferromagnet PdCrO2

    Magnetic frustration, realized in the special geometrical arrangement of localized spins, often promotes topologically nontrivial spin textures in the real space and induces significantly large unconventional ...

    Hoseong Jeon, Hyeongwoo Seo, Junho Seo, Yong Hyun Kim in Communications Physics (2024)

  2. Article

    Open Access

    Author Correction: Interfacial stabilization for epitaxial CuCrO2 delafossites

    Jong Mok Ok, Sangmoon Yoon, Andrew R. Lupini, Panchapakesan Ganesh in Scientific Reports (2023)

  3. Article

    Open Access

    Quantum transport evidence of isolated topological nodal-line fermions

    Anomalous transport responses, dictated by the nontrivial band topology, are the key for application of topological materials to advanced electronics and spintronics. One promising platform is topological noda...

    Hoil Kim, Jong Mok Ok, Seyeong Cha, Bo Gyu Jang, Chang Il Kwon in Nature Communications (2022)

  4. No Access

    Article

    Preparation of large Cu3Sn single crystal by Czochralski method

    Cu3Sn was recently predicted to host topological Dirac fermions, but related research is still in its infancy. The growth of large and high-quality Cu3Sn single crystals is, therefore, highly desired to investiga...

    Minsik Kong, Sang-Eon Park, Hye Jung Kim in Journal of the Korean Physical Society (2022)

  5. Article

    Open Access

    Interfacial stabilization for epitaxial CuCrO2 delafossites

    ABO2 delafossites are fascinating materials that exhibit a wide range of physical properties, including giant Rashba spin splitting and anomalous Hall effects, because of their characteristic layered structures c...

    Jong Mok Ok, Sangmoon Yoon, Andrew R. Lupini, Panchapakesan Ganesh in Scientific Reports (2020)

  6. Article

    Open Access

    Separate tuning of nematicity and spin fluctuations to unravel the origin of superconductivity in FeSe

    The interplay of orbital and spin degrees of freedom is the fundamental characteristic in numerous condensed matter phenomena, including high-temperature superconductivity, quantum spin liquids, and topologica...

    Seung-Ho Baek, Jong Mok Ok, Jun Sung Kim, Saicharan Aswartham in npj Quantum Materials (2020)

  7. No Access

    Article

    Large anomalous Hall current induced by topological nodal lines in a ferromagnetic van der Waals semimetal

    Topological semimetals host electronic structures with several band-contact points or lines and are generally expected to exhibit strong topological responses. Up to now, most work has been limited to non-magn...

    Kyoo Kim, Junho Seo, Eunwoo Lee, K.-T. Ko, B. S. Kim, Bo Gyu Jang in Nature Materials (2018)

  8. Article

    Open Access

    Frustration-driven C 4 symmetric order in a naturally-heterostructured superconductor Sr2VO3FeAs

    A subtle balance between competing interactions in iron-based superconductors (FeSCs) can be tipped by additional interfacial interactions in a heterostructure, often inducing exotic phases with unprecedented ...

    Jong Mok Ok, S.-H. Baek, C. Hoch, R. K. Kremer, S. Y. Park in Nature Communications (2017)

  9. Article

    Open Access

    Broken-Symmetry Quantum Hall States in Twisted Bilayer Graphene

    Twisted bilayer graphene offers a unique bilayer two-dimensional-electron system where the layer separation is only in sub-nanometer scale. Unlike Bernal-stacked bilayer, the layer degree of freedom is disenta...

    Youngwook Kim, Jaesung Park, Intek Song, Jong Mok Ok, Younjung Jo in Scientific Reports (2016)

  10. No Access

    Article

    Enhancement of in-plane magnetic anisotropy in (111)-oriented Co0.8Fe2.2O4 thin film by deposition of PZT top layer

    The CoFe2O4 and Co0.8Fe2.2O4 single layer (CFO) as well as PZT/CoFe2O4 and PZT/Co0.8Fe2.2O4 bilayer thin films were grown using the pulsed laser deposition technique on Pt(111)/Si substrates at 600 °C. All films ...

    M. Khodaei, S. A. Seyyed Ebrahimi, Yong Jun Park, Jong Mok Ok in Applied Physics A (2014)

  11. Article

    Open Access

    Direct Observation of Localized Spin Antiferromagnetic Transition in PdCrO2 by Angle-Resolved Photoemission Spectroscopy

    We report the first case of the successful measurements of a localized spin antiferromagnetic transition in delafossite-type PdCrO2 by angle-resolved photoemission spectroscopy (ARPES). This demonstrates how to c...

    Han-** Noh, **won Jeong, Bin Chang, Dahee Jeong, Hyun Sook Moon in Scientific Reports (2014)