S Emura et al 2009 J. Phys.: Conf. Ser. 190 012102 doi:10.1088/1742-6596/190/1/012102
Broken symmetry of cage surrounding magnetic dopant Cr ion in cubic GaN
S Emura, K Tokuda, S Kobayashi, Y K Zhou, S Hasegawa and H Asahi
Show affiliationsThe X-ray absorption spectra around the Cr K-edge are observed to reveal the strange behaviour on the magnetism of the dilute magnetic semiconductor GaCrN with a cubic structure (F
3 m = Td2). The radial distribution function analyzed in the part of the X-ray absorption fine structure shows the splitting in the first and the second nearest neighbours into two peaks, indicating that the Cr ion substitutes the Ga ion but shifts from just the lattice site of the Ga ion. This local lattice instability breaking the symmetry is explained by pseudo-Jahn – Teller effect. In the relation to the local lattice instability, the electronic ground state of the Cr ion in the cubic GaN is discussed.
- PACS
-
78.70.Dm X-ray absorption spectra
75.50.Dd Nonmetallic ferromagnetic materials
75.50.Pp Magnetic semiconductors
71.70.Ej Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect
- Subjects
- Dates
-
Issue 1 (2009)
-
Broken symmetry of cage surrounding magnetic dopant Cr ion in cubic GaN
S Emura et al 2009 J. Phys.: Conf. Ser. 190 012102
-
A robust probabilistic approach for variational inversion in shallow water acoustic tomography
M Berrada et al 2009 Inverse Problems 25 115016
-
XAS study of the active site of a bacterial heme-sensor
S Della Longa et al 2009 J. Phys.: Conf. Ser. 190 012202
-
Improved search for galactic white-dwarf binaries in Mock LISA Data Challenge 1B using an
-statistic template bank
John T Whelan et al 2008 Class. Quantum Grav. 25 184029
-
Scale and twist effects on the strength of nanostructured yarns and reinforced composites
I J Beyerlein et al 2009 Nanotechnology 20 485702
-
Singularity avoidance in quantum FRW cosmologies in the presence of barotropic perfect fluids
Emilio Elizalde and Jaume Haro 2009 J. Phys. A: Math. Theor. 42 472001
-
EXAFS spectroscopy investigation Cu(II) complexes encapsulated in cucurbit[8]uril
S Trubina et al 2009 J. Phys.: Conf. Ser. 190 012128
-
New YBCO superconducting wires obtained from narrow textured tubes
P Odier et al 2009 Supercond. Sci. Technol. 22 125024
-
Thermal stability of nanostructurally stabilized zirconium oxide
Fereydoon Namavar et al 2007 Nanotechnology 18 415702
-
Correlation of magnetism and structure for ultra thin Au/Co/Au films: Evidence for magnetoelastic effects
M Sakamaki et al 2009 J. Phys.: Conf. Ser. 190 012113