Title: Pressure effect and electron diffraction on the anomalous transition in ternary superconductor Bi2Rh3Se2
Authors: Chen, C. Y.
Chan, C. L.
Mukherjee, S.
Chou, C. C.
Tseng, C. M.
Hsu, S. L.
Chu, M. -W.
Lin, J. -Y.
Yang, H. D.
Institute of Physics
Keywords: Bi2Rh3Se2 ternary compound;Structural phase-transformation;Effects of pressure;Transmission electron microscopy
Issue Date: 1-Jan-2014
Abstract: 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.
URI: http://dx.doi.org/10.1016/j.ssc.2013.09.025
ISSN: 0038-1098
DOI: 10.1016/j.ssc.2013.09.025
Volume: 177
Begin Page: 42
End Page: 45
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