Charge disproportionation observed by resonant X-ray scattering at the metal–insulator transition in NdNiO3

2004 ◽  
Vol 345 (1-4) ◽  
pp. 23-25 ◽  
Author(s):  
U. Staub ◽  
V. Scagnoli ◽  
M. Janousch ◽  
G.I. Meijer ◽  
L. Paolasini ◽  
...  
Keyword(s):  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
X Ray ◽  
X Ray Scattering ◽  
Charge Disproportionation ◽  
Ray Scattering

scholarly journals Magnetic structure and 5d-electronic state in a pyrochlore iridate Eu2Ir2O7

2014 ◽  
Vol 70 (a1) ◽  
pp. C1457-C1457
Author(s):  
Hajime Sagayama ◽  
Daisuke Uematsu ◽  
Taka-hisa Arima ◽  
Jun Ishikawa ◽  
Eoin O'Farrell ◽  
...  
Keyword(s):  
Electronic State ◽  
Magnetic Moments ◽  
Crystal Structure Analysis ◽  
Insulator Transition ◽  
Face Centered Cubic ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

The pyrochlore-type iridium oxide Eu2Ir2O7 exhibits a metal-insulator transition at 120 K, accompanied by magnetic ordering. We performed resonant x-ray scattering (RXS) experiment with photon energies near the iridium absorption edge L3 to investigate the arrangement of Ir4+ magnetic moments. Magnetic RXS was observed in the insulating phase, providing direct evidence of long-range ordering of Ir4+ magnetic moments with a propagation vector of (4n+2 0 0) . Our single-crystal structure analysis revealed that the lattice retains its face-centered-cubic structure across the metal-insulator transition, indicating all-in-all-out magnetic order, where all the magnetic moments on the four vertices of each Ir4+ tetrahedron point inward or outward as shown in Fig. 1 [1]. To investigate the 5d-electronic state of Ir4+, we performed resonant inelastic x-ray scattering (RIXS) experiment near the L3 edge. Obtained RIXS spectra indicate that the 5d-electronic state is affected by not only the spin-orbit interaction but also trigonal distortion of IrO6 octahedron [2].

Charge transfer at the metal-insulator transition inV2O3thin films by resonant inelastic x-ray scattering

2008 ◽  
Vol 77 (4) ◽  
Author(s):  
C. F. Hague ◽  
J.-M. Mariot ◽  
V. Ilakovac ◽  
R. Delaunay ◽  
M. Marsi ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

Metal-insulator transition in studied by X-ray scattering

2007 ◽  
Vol 310 (2) ◽  
pp. 895-897 ◽  
Author(s):  
H. Nakao ◽  
S. Kodama ◽  
K. Kiyoto ◽  
D. Bizen ◽  
Y. Murakami ◽  
...  
Keyword(s):  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals RNiO3perovskites (R=Pr,Nd): Nickel valence and the metal-insulator transition investigated by x-ray-absorption spectroscopy

1992 ◽  
Vol 46 (23) ◽  
pp. 14975-14984 ◽  
Author(s):  
M. Medarde ◽  
A. Fontaine ◽  
J. L. García-Muñoz ◽  
J. Rodríguez-Carvajal ◽  
M. de Santis ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Insulator Transition ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
X Ray ◽  
X Ray Absorption
Sign in / Sign up

Export Citation Format

Share Document