Seung Gyo Jeong, Taewon Min, Sungmin Woo, Jiwoong Kim, Yu-Qiao Zhang, Seong Won Cho, Jaeseok Son, Young-Min Kim, Jung Hoon Han, Sungkyun Park, Hu Young Jeong, Hiromichi Ohta, Suyoun Lee, Tae Won Noh, Jaekwang Lee* and Woo Seok Choi*, “Phase Instability amid Dimensional Crossover in Artificial Oxide Crystal”, Phys. Rev. Lett. 124, 026401 (2020)