Symmetry Dictated Grain Boundary State in a Two-dimensional Topological Insulator Hyo Won Kim, Seoung-Hun Kang, Hyun-Jung Kim, Kisung Chae, Suyeon Cho, Wonhee Ko, Sangjun Jeon, Se Hwang Kang, Heejun Yang, Sung Wng Kim, Seongjun Park, Sung Woo Hwang, Young-Kyun Kwon, Young-Woo Son, Nano Lett. 20 (8), 5837-5843 (2020).
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