Frustrated Magnetism in Mott Insulating (V1-xCrx)2O3

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Author(s)

  • J. C. Leiner
  • H. O. Jeschke
  • R. Valentí
  • S. Zhang
  • A. T. Savici
  • J. Y.Y. Lin
  • M. B. Stone
  • M. D. Lumsden
  • Jiawang Hong
  • O. Delaire
  • C. L. Broholm

Detail(s)

Original languageEnglish
Article number011035
Journal / PublicationPhysical Review X
Volume9
Issue number1
Publication statusPublished - Jan 2019
Externally publishedYes

Abstract

V2O3 famously features all four combinations of paramagnetic versus antiferromagnetic and metallic versus insulating states of matter in response to percent-level doping, pressure in the GPa range, and temperature below 300 K. Using time-of-flight neutron spectroscopy combined with density functional theory calculations of magnetic interactions, we have mapped and analyzed the inelastic magnetic neutron scattering cross section over a wide range of energy and momentum transfer in the chromium-stabilized antiferromagnetic and paramagnetic insulating phases. Our results reveal an important magnetic frustration and degeneracy of the paramagnetic insulating phase which is relieved by the rhombohedral-to-monoclinic transition at T=185 K. This leads to the recognition that magnetic frustration is an inherent property of the paramagnetic phase in (V1-xCrx)2O3 and plays a key role in suppressing the magnetic long-range-ordering temperature and exposing a large phase space for the paramagnetic Mott metal-insulator transition to occur.

Citation Format(s)

Frustrated Magnetism in Mott Insulating (V1-xCrx)2O3. / Leiner, J. C.; Jeschke, H. O.; Valentí, R.; Zhang, S.; Savici, A. T.; Lin, J. Y.Y.; Stone, M. B.; Lumsden, M. D.; Hong, Jiawang; Delaire, O.; Bao, Wei; Broholm, C. L.

In: Physical Review X, Vol. 9, No. 1, 011035, 01.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal