O. B. Korneta

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O. B. Korneta,1,2 Tongfei Qi,1,2 S. Chikara,1,2 S. Parkin,1,3 L. E. De Long,1,2 P. Schlottmann,4 and G. Cao1,2,* 1Center for Advanced Materials, University of Kentucky, Lexington, Kentucky 40506, USA 2Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA 3Department of Chemistry, University of Kentucky, Lexington,(More)
system Sr5Rh4O12 M. Ge, O. B. Korneta, T. F. Qi, S. Parkin, P. Schlottmann, and G. Cao University of Science and Technology of China, Hefei, Anhui 230026, China Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA Center for Advanced Materials, University of Kentucky, Lexington, Kentucky 40506, USA Department of(More)
T. F. Qi,1,2 O. B. Korneta,1,2 S. Parkin,1,3 Jiangping Hu,4 and G. Cao1,2,* 1Center for Advanced Materials, University of Kentucky, Lexington, Kentucky 40506, USA 2Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA 3Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA 4Department of(More)
We report an experimental/theoretical study of single-crystal Bi(2)Ir(2)O(7) that possesses a metallic state with strongly exchange-enhanced paramagnetism. The ground state of Bi(2)Ir(2)O(7) is characterized by the following features: (1) a divergent low-temperature magnetic susceptibility that indicates no long-range order down to 50 mK; (2) strongly(More)
O. B. Korneta,1,2 S. Chikara,1,2 S. Parkin,1,3 L. E. DeLong,1,2 P. Schlottmann,4 and G. Cao1,2,* 1Center for Advanced Materials, University of Kentucky, Lexington, Kentucky 40506, USA 2Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA 3Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA(More)
We report structural, magnetic, dielectric and thermal properties of single-crystal BaMnO(2.99) and its derivatives BaMn(0.97)Li(0.03)O(3) and Ba(0.97)K(0.03)MnO(3). The hexagonal 15R-BaMnO(2.99) perovskite phase is a known antiferromagnetic insulator that orders at a Néel temperature T(N) = 220 K. We find dilute Li and K doping change the ratio of cubic to(More)
Jeff5 1/2 Mott insulator into an exotic metallic state T. F. Qi O. B. Korneta S. Chikara M. Ge S. Parkin L. E. De Long P. Schlottmann, and G. Cao Center for Advanced Materials, University of Kentucky, Lexington, Kentucky 40506, USA Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA Department of Chemistry, University(More)
The versatile family of sodium cobalt oxides emerged recently as a new target object for theoretical and experimental studies of various aspects of magnetism, superconductivity, and their interplay. The series NaxCoO2 (x<l) includes, besides a new superconductor ~, Na0.3CoOfyH20 (y =1.3) and its parent compound Na0.75CoO2, the material remarkable on its own(More)
Ca₂RuO₄ undergoes a metal-insulator transition at T(MI)=357  K, followed by a well-separated transition to antiferromagnetic order at T(N)=110  K. Dilute Cr doping for Ru reduces the temperature of the orthorhombic distortion at T(MI) and induces ferromagnetic behavior at T(C). The lattice volume V of Ca₂Ru₁-(x)Cr(x)O₄ (0 < x < 0.13) abruptly expands with(More)
Angle-resolved photoemission measurements have been performed on Bi2Ir2O7 single crystals, a metallic end-member of the family of pyrochlore iridates. The density of states, the Fermi surface, and the near-Fermi-level band dispersion in the plane perpendicular to the (1, 1, 1) direction were all measured and found to be in rough overall agreement with our(More)
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