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

Abstract

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.

arXiv comment19 pages, 4 main figures, 6 Supplementary figures

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Cited by in corpus (2)

• Implementing Microwave Impedance Microscopy in a Dilution Refrigerator
• Spatial inhomogeneity and the metal-insulator transition in Ca${}_3$(Ru${}_{1-x}$Ti${}_x$)${}_2$O${}_7$