Intertwined magnetic, structural, and electronic transitions in V${}_2$O${}_3$

Abstract

We present a coordinated study of the paramagnetic-to-antiferromagnetic, rhombohedral-to-monoclinic, and metal-to-insulator transitions in thin-film specimens of the classic Mott insulator V${}_2$O${}_3$ using low-energy muon spin relaxation, x-ray diffraction, and nanoscale-resolved near-field infrared spectroscopic techniques. The measurements provide a detailed characterization of the thermal evolution of the magnetic, structural, and electronic phase transitions occurring in a wide temperature range, including quantitative measurements of the high- and low-temperature phase fractions for each transition. The results reveal a stable coexistence of the high- and low-temperature phases over a broad temperature range throughout the transition. Careful comparison of temperature dependence of the different measurements, calibrated by the resistance of the sample, demonstrates that the electronic, magnetic, and structural degrees of freedom remain tightly coupled to each other during the transition process. We also find evidence for antiferromagnetic fluctuations in the vicinity of the phase transition, highlighting the important role of the magnetic degree of freedom in the metal-insulator transition.

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Cited by in corpus (5)

• Nanoscale self-organisation and metastable non-thermal metallicity in Mott insulators
• Uniform structural phase transition in V${}_2$O${}_3$ without short-range distortions of the local structure
• Direct visualization of percolating metal-insulator transition in V2O3 using scanning microwave impedance microscopy
• Spin Seebeck Effect in Correlated Antiferromagnetic V2O3
• Elastic stripes formation at electronic transitions