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Changyoung Kim

As seen in: Nature, Wiley Online Library, PLOS ONE, MDPI, Science Magazine, Physical Review B, Mondaq
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Articles

Correlated singular flat bands on the surface pentagonal lattice of ferromagnetic CoS 2

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By Yuting Qian, Younsik Kim, Taekoo Oh, Yoonseok Hwang, Wonshik Kyung, Sehoon Kim, Suyoung Lee, Mi Kyung Kim, Cheng-Maw Cheng, Min-Seok Kim, Changming Yue, Jungpil Seo, Changyoung Kim, Bohm-Jung Yang, Du Hyung Kim, Junseo Yoo, Hyunjee Song
| Nature Verified
Abstract Flat bands have been proposed in various geometrically frustrated lattices, yet their experimental realization has been limited only to the two-dimensional (2D) kagome and three-dimensional (3D) pyrochlore lattices. While synthesizing bulk crystals with desired lattice geometry is generally challenging, the surfaces of 3D bulk materials sometimes naturally host 2D lattice structures hardly achievable in 2D bulk crystals.
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Treatment sequence patterns of urate-lowering therapy in Korean patients with gout: A common data model-based study

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By Min Kim, Changyoung Kim, Eun-Gee Park
| PLOS ONE
Loading metrics Open Access Peer-reviewed Research Article Citation: Kim MJ, Park E-G, Kim C, Kang DY, Ryu B, Shin K (2026) Treatment sequence patterns of urate-lowering therapy in Korean patients with gout: A common data model-based study. PLoS One 21(4): e0347654. https://doi.org/10.1371/journal.pone.0347654 Editor: Sian Yik Lim, Straub Medical Center, UNITED STATES OF AMERICA Received: December 6, 2025; Accepted: April 5, 2026; Published: April 17, 2026 Copyright: © 2026 Kim et al.
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Coexisting kagome and heavy fermion flat bands in YbCr 6 Ge 6

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By Churlhi Lyi, Taehee Lee, Jinyoung Kim, Sangjae Lee, Younsik Kim, Anil Rajapitamahuni, Asish K Kundu, Elio Vescovo, Byeong-Gyu Park, Changyoung Kim, Charles Ahn, Frederick J. Walker, Ji Seop Oh, Bo Gyu Jang, Youngkuk Kim, Byungmin Sohn, Tuson Park, Hanoh Lee, Hyeonhui Na
| Nature Verified
Abstract Flat bands, electronic states with nearly dispersionless energy-momentum structure, provide fertile ground for unconventional quantum phases. Recent observations of flat bands at the Fermi level in kagome metals open the possibility of unifying topology and correlation-driven heavy-fermion physics. Here we show that topology and heavy-fermion correlations coexist in the layered kagome metal YbCr6Ge6.
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