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• W3033489359 abstract "Despite decades of efforts, the origin of metal-insulator transitions (MITs) in strongly correlated materials remains one of the main long-standing problems in condensed-matter physics. An archetypal example is ${mathrm{V}}_{2}{mathrm{O}}_{3}$, which undergoes simultaneous electronic, structural, and magnetic phase transitions. This remarkable feature highlights the many degrees of freedom at play in this material. In this work, acting solely on the magnetic degree of freedom, we reveal an anomalous feature in the electronic transport of ${mathrm{V}}_{2}{mathrm{O}}_{3}$: On cooling, the magnetoresistance changes from positive to negative values well above the MIT temperature, and shows divergent behavior at the transition. The effects are attributed to the magnetic field quenching antiferromagnetic fluctuations above the N'eel temperature ${T}_{N}$, and preventing long-range antiferromagnetic ordering below ${T}_{N}$. In both cases, suppressing the antiferromagnetic ordering prevents the opening of the incipient electronic gap. This interpretation is supported by Hubbard model calculations which fully reproduce the experimental behavior. Our study sheds light on this classic problem providing a clear and physical interpretation of the nature of the metal-insulator transition." @default.
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• W3033489359 date "2020-06-01" @default.
• W3033489359 modified "2023-10-01" @default.
• W3033489359 title "Magnetic field frustration of the metal-insulator transition in <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi mathvariant=normal>V</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:mrow></mml:math>" @default.
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• W3033489359 doi "https://doi.org/10.1103/physrevb.101.245109" @default.
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