Browsing by Author "Mukherjee, S."

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Pressure effect and electron diffraction on the anomalous transition in ternary superconductor Bi2Rh3Se2
(2014-01-01)
Chen, C. Y.
;
Chan, C. L.
;
Mukherjee, S.
;
Chou, C. C.
;
Tseng, C. M.
The effect of external hydrostatic pressure up to 22.23 kbar on the temperature-dependent transport properties of the ternary compound Bi2Rh3Se2 is investigated. Interestingly, the resistive anomaly at T-s similar to 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. A more elaborately determined room-temperature C-centered lattice was also proposed. (C) 2013 Elsevier Ltd. All rights reserved.