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Article
Superconductivity versus structural phase transition in the closely related Bi2Rh3.5S2 and Bi2Rh3S2
Physical Review B
  • Udhara S. Kaluarachchi, Iowa State University
  • Weiwei Xie, Iowa State University
  • Qisheng Lin, Ames Laboratory
  • Valentin Taufour, Iowa State University
  • Sergey L. Bud'ko, Iowa State University
  • Gordon J. Miller, Iowa State University
  • Paul C. Canfield, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
5-1-2015
DOI
10.1103/PhysRevB.91.174513
Abstract

Single crystals of Bi2Rh3S2 and Bi2Rh3.5S2 were synthesized by solution growth, and the crystal structures and thermodynamic and transport properties of both compounds were studied. In the case ofBi2Rh3S2, a structural first-order transition at around 165 K is identified by single-crystal diffraction experiments, with clear signatures visible in resistivity, magnetization, and specific heat data. No superconducting transition for Bi2Rh3S2 was observed down to 0.5 K. In contrast, no structural phase transition at high temperature was observed for Bi2Rh3.5S2; however, bulk superconductivity with a critical temperature, Tc≈1.7 K, was observed. The Sommerfeld coefficient γ and the Debye temperature (ΘD) were found to be 9.41 mJ mol−1K−2 and 209 K, respectively, for Bi2Rh3S2, and 22 mJ mol−1K−2 and 196 K, respectively, for Bi2Rh3.5S2. Study of the specific heat in the superconducting state of Bi2Rh3.5S2 suggests that Bi2Rh3.5S2 is a weakly coupled, BCS superconductor.

Comments

This article is from Physical Review B 91 (2015): 174513, doi:10.1103/PhysRevB.91.174513. Posted with permission.

Copyright Owner
American Physical Society
Language
en
Date Available
2015-05-31
File Format
application/pdf
Citation Information
Udhara S. Kaluarachchi, Weiwei Xie, Qisheng Lin, Valentin Taufour, et al.. "Superconductivity versus structural phase transition in the closely related Bi2Rh3.5S2 and Bi2Rh3S2" Physical Review B Vol. 91 Iss. 17 (2015) p. 174513
Available at: http://works.bepress.com/gordon-miller/92/