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Title: Superconductivity versus structural phase transition in the closely related Bi2Rh3.5S2 and Bi2Rh3S2

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics

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 of Bi2Rh3S2, 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. As a result, the study of the specific heat in the superconducting state of Bi2Rh3.5S2 suggests that Bi2Rh3.5S2 is a weakly coupled, BCS superconductor.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FA9550-09-1-0603; AC02-07CH11358
OSTI ID:
1227310
Alternate ID(s):
OSTI ID: 1182334
Report Number(s):
IS-J-8643; PRBMDO
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 17; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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Cited By (4)

Use of frit-disc crucibles for routine and exploratory solution growth of single crystalline samples journal December 2015
Superconducting and charge density wave transition in single crystalline LaPt 2 Si 2 journal May 2017
New materials physics journal November 2019
Use of frit-disc crucibles for routine and exploratory solution growth of single crystalline samples text January 2015

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