Infrared phonon anomaly and magnetic excitations in single-crystal Cu${}_3$Bi(SeO${}_3$)${}_2$O${}_2$Cl

K. H. Miller, P. W. Stephens, C. Martin +5

Infrared reflection and transmission as a function of temperature have been measured on single crystals of Cu${}_3$Bi(SeO${}_3$)${}_2$O${}_2$Cl. The complex dielectric function and…