Emergent Phenomena

Homepage: http://magnetism.snu.ac.kr

[Group Introduction]

The Emergent Phenomena Group, led by Prof. Je-Geun Park, is the second group to be established within the IBS Center for Correlated Electron Systems. We focus on studies of strongly correlated electron systems such as transition metal oxides and related materials, mostly in bulk form. The group consists of three teams: the Materials Team, Physical Properties Team, and Scattering Team. Having these three teams working together allows our group to paint a complete picture of novel materials, studying their crystal and magnetic structure, physical properties and spin dynamics.

We are currently conducting research into the following selected topics: multiferroic behavior, spin-orbital coupling in transition metal oxides, and low dimensional magnetism.

For the study of emergent phenomena, we have equipped ourselves with several state-of-the-art instruments. For materials synthesis we have two infra-red mirror floating zone furnaces and one high-pressure anvil furnace: we also have furnaces for flux growth and more conventional solid-state reaction methods. We carry out bulk characterization using in-house equipment, including two commercial XRD machines, SEM-EDS, MPMS-5XL, and PPMS9. For the studies of structure and spin dynamics, we use various neutron instruments at overseas facilities.

  • Exfoliation and Raman spectroscopic fingerprint of few-layer NiPS 3 Van der Waals crystals
    Cheng-Tai Kuo, Michael Neumann, Karuppannan Balamurugan, Hyun Ju Park, Soonmin Kang, Hung Wei Shiu, Jin Hyoun Kang, Byung Hee Hong, Moonsup Han, Tae Won Noh & Je-Geun Park
    Sci. Rep. 6, 20904
  • Temperature-Dependent Interplay of Dzyaloshinskii-Moriya Interaction and Single-Ion Anisotropy in Multiferroic BiFeO 3
    Jaehong Jeong, Manh Duc Le, P. Bourges, S. Petit, S. Furukawa, Shin-Ae Kim, Seongsu Lee, S-W. Cheong, and Je-Geun Park
    Phys. Rev. Lett. 113, 107202 (2014)
  • Magnon breakdown in a two dimensional triangular lattice Heisenberg antiferromagnet of multiferroic LuMnO3
    Joosung Oh, Manh Duc Le, Jaehong Jeong, Jung-hyun Lee, Hyungje Woo, Wan-Young Song, T. G. Perring, W. J. L. Buyers, S-W. Cheong, and Je-Geun Park
    Phys. Rev. Lett. 111, 257202 (2013) Selected as Editors' Suggestion
  • Negative magnetostrictive magnetoelectric coupling of BiFeO3
    Sanghyun Lee, M. T. Fernandez-Diaz, H. Kimura, Y. Noda, D. T. Adroja, Seongsu Lee, Junghwan Park, V. Kiryukhin, S-W. Cheong, M. Mostovoy, and Je-Geun Park
    Phys. Rev. B Rapid Comm. 88, 060103R (2013) Selected as Editors' Suggestion and also for Viewpoint in Physics
  • Viewpoint: Three-dimensional forest fire with quantum mechanical trees
    Je-Geun Park and Carley Paulsen Physics 6, 55 (2013)
  • Spin wave measurements over the full Brillouin zone of multiferroic BiFeO3
    Jaehong Jeong, E. A. Goremychkin, T. Guidi, K. Nakajima, Gun Sang Jeon, Shin-Ae Kim, S. Furukawa, Yong Baek Kim, Seongsu Lee, V. Kiryukhin, S-W. Cheong, and Je-Geun Park
    Phys. Rev. Lett. 108, 077202 (2012)