A structural phase transition at Tc 130K in BaV10 O15 containing modified V3+ (3 d2) triangular lattices was studied. It was found that the electrical resistivity jumps by three orders of magnitude and a gap opens up in the optical conductivity spectrum at Tc. It was also found from synchrotron x-ray powder-diffraction measurement that the trimerization of the V ions occurs below Tc. These results indicate that the orbital ordering of V t2g states occurs at Tc and that induces a charge gap near the Fermi level in the electronic states of BaV10 O15.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2010 Feb 10|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics