Surface triggered stabilization of metastable charge-ordered phase in SrTiO3open access
- Authors
- Eom, Kitae; Chung, Bongwook; Oh, Sehoon; Zhou, Hua; Seo, Jinsol; Oh, Sang Ho; Jang, Jinhyuk; Choi, Si-Young; Choi, Minsu; Seo, Ilwan; Lee, Yun Sang; Kim, Youngmin; Lee, Hyungwoo; Lee, Jung-Woo; Lee, Kyoungjun; Rzchowski, Mark; Eom, Chang-Beom; Lee, Jaichan
- Issue Date
- Feb-2024
- Publisher
- Nature Research
- Citation
- Nature Communications, v.15, no.1
- Journal Title
- Nature Communications
- Volume
- 15
- Number
- 1
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/32730
- DOI
- 10.1038/s41467-024-45342-8
- ISSN
- 2041-1723
2041-1723
- Abstract
- Charge ordering (CO), characterized by a periodic modulation of electron density and lattice distortion, has been a fundamental topic in condensed matter physics, serving as a potential platform for inducing novel functional properties. The charge-ordered phase is known to occur in a doped system with high d-electron occupancy, rather than low occupancy. Here, we report the realization of the charge-ordered phase in electron-doped (100) SrTiO3 epitaxial thin films that have the lowest d-electron occupancy i.e., d1-d0. Theoretical calculation predicts the presence of a metastable CO state in the bulk state of electron-doped SrTiO3. Atomic scale analysis reveals that (100) surface distortion favors electron-lattice coupling for the charge-ordered state, and triggering the stabilization of the CO phase from a correlated metal state. This stabilization extends up to six unit cells from the top surface to the interior. Our approach offers an insight into the means of stabilizing a new phase of matter, extending CO phase to the lowest electron occupancy and encompassing a wide range of 3d transition metal oxides. © The Author(s) 2024.
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