Phase Instability amid Dimensional Crossover in Artificial Oxide Crystal
- Phase Instability amid Dimensional Crossover in Artificial Oxide Crystal
- 이수연; 조성원; Seung Gyo Jeong; Taewon Min; Sungmin Woo; Jiwoong Kim; Yu-Qiao Zhang; Jaeseok Son; Young-Min Kim; Jung Hoon Han; Sungkyun Park; Hu Young Jeong; Hiromichi Ohta; Tae Won Noh; Jaekwang Lee; Woo Seok Choi
- Issue Date
- Physical review letters
- VOL 124, 026401
- Artificial crystals synthesized by atomic-scale epitaxy provide the ability to control the dimensions of the quantum phases and associated phase transitions via precise thickness modulation. In particular, the reduction in dimensionality via quantized control of atomic layers is a powerful approach to revealing hidden electronic and magnetic phases. Here, we demonstrate a dimensionality-controlled and induced metal-insulator transition (MIT) in atomically designed superlattices by synthesizing a genuine twodimensional (2D) SrRuO3 crystal with highly suppressed charge transfer. The tendency to ferromagnetically align the spins in an SrRuO3 layer diminishes in 2D as the interlayer exchange interaction vanishes, accompanying the 2D localization of electrons. Furthermore, electronic and magnetic instabilities in the two SrRuO3 unit cell layers induce a thermally driven MIT along with a metamagnetic transition.
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