Emergence of Competing Stripe Phase near the Mott Transition in Ti-doped Bilayer Calcium Ruthenates

We report the nanoscale imaging of Ti-doped bilayer calcium ruthenates during the Mott metal-insulator transition by microwave impedance microscopy. Different from a typical first-order phase transition where coexistence of the two terminal phases takes place, a new metallic stripe phase oriented al...

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Bibliographic Details
Published in:arXiv.org 2020-02
Main Authors: Gangshettiwar, Ashish, Zhu, Yanglin, Jiang, Zhanzhi, Peng, Jin, Wang, Yu, He, Jiaming, Zhou, Jianshi, Mao, Zhiqiang, Lai, Keji
Format: Article
Language:English
Subjects:
Antiferromagnetism
Bilayers
Calcium
Electron states
Insulators
Metal-insulator transition
Phase diagrams
Phase separation
Phase transitions
Titanium
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Summary:We report the nanoscale imaging of Ti-doped bilayer calcium ruthenates during the Mott metal-insulator transition by microwave impedance microscopy. Different from a typical first-order phase transition where coexistence of the two terminal phases takes place, a new metallic stripe phase oriented along the in-plane crystalline axes emerges inside both the G-type antiferromagnetic insulating state and paramagnetic metallic state. The effect of this electronic state can be observed in macroscopic measurements, allowing us to construct a phase diagram that takes into account the energetically competing phases. Our work provides a model approach to correlate the macroscopic properties and mesoscopic phase separation in complex oxide materials.
ISSN:2331-8422
DOI:10.48550/arxiv.2002.10489