The electro-magnetic behaviors of K-doped Cu_1-xK_xIr₂S₄ are investigated. It is found that

the doping of K has rare effect on the crystal lattice, however, apparent influence on the chemical bonds is observed from the Raman spectroscopy. In addition, the doping of K has prominent impact on the electronic and magnetic behaviors. Although the phase transition temperature is hardly affected by the doping of K, the hysteresis of orbitally induced

Peierls phase transition is widened, which may be attributed to the potential barriers

caused by the dopant. Moreover, the (T) relation in the insulating phase has the

tendency to metallic behavior, which indicates the orbital hybridization between 3p⁶

electrons of K⁺ with that of S^2- ions.

link to this article:

http://journals.jps.jp/doi/abs/10.7566/JPSJ.83.024602