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Lee, Hyun-Jae; Lee, Minseong; Lee, Kyoungjun; Jo, Jinhyeong; Yang, Hyemi; Kim, Yungyeom; Chae, Seung Chul; Waghmare, Umesh; Lee, Jun Hee . (2020). Scale-free ferroelectricity induced by flat phonon bands in HfO <sub/>2</sub>. Science, (), eaba0067–. doi:10.1126/science.aba0067 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research