The effect of external hydrostatic pressure up to 22.23 kbar on the temperature-dependent transport properties of the ternary compound Bi 2 Rh 3 Se 2 is investigated. Interestingly, the resistive anomaly at T s ~250 K, previously proposed as a charge-density-wave (CDW) transition, is shifted to higher temperature with increasing pressure, in distinct contrast to an established knowledge for CDW. Using temperature-dependent electron-diffraction characterizations, we have unraveled that this transition is, in effect, of a structural phase-transformation nature, experiencing the symmetry reduction from a high-symmetry C-centered monoclinic lattice to a low-symmetry primitive one below T s . A more elaborately determined room-temperature C-centered lattice was also proposed.
- A. Bi Rh Se ternary compound
- D. Structural phase-transformation
- E. Effects of pressure
- E. Transmission electron microscopy