The mixed valence compound Sm4Bi3 shows the charge ordered state of Sm2+ and Sm3+ with a ratio of 3:1 and its behavior is similar to that of well-known compound Yb4As3. The main interest in Sm4Bi3 is a pressure-induced iso-structural transition from a mixed valence state to a trivalent state, in which physical properties are very similar to that of Sm4Sb3. To reproduce the high-pressure phase, we synthesized and investigated Sm4(Bi1-xSbx)3 system. With increasing Sb content, the carrier concentration decreases and the charge ordering temperature slightly increases, while by applying pressure the ordering temperature decreases. These relationships between the substitution and pressure effect in Sm4Bi3 is very similar to that in Yb4As3. So, it may be suggested that Sm4Bi3 is a semimetal in the same way as the case of Yb4As3. The substitution effect may be different from the pressure effect though both effects finally lead to a trivalent state.
- Charge order
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering