Orbital order and fluctuations in the two-leg ladder materials BaFe${}_2{X}_3$ ($X$ = S and Se) and CsFe${}_2$Se${}_3$

Kou Takubo, Yuichi Yokoyama, Hiroki Wadati +10

The electronic structure of BaFe${}_2{X}_3$ ($X$ = S and Se) and CsFe${}_2$Se${}_3$ in which two-leg ladders are formed by the Fe sites are studied by means of x-ray absorption and resonan…