Superconducting and normal state properties of the systems ( )
Abstract
Electrical resistivity, magnetization, and specific heat measurements were performed on polycrystalline samples of the filled-skutterudite systems La1-xMxPt4Ge12 (M = Ce, Th). Superconductivity in LaPt4Ge12 was quickly suppressed with Ce substitution and no evidence for superconductivity was found down to 1.1 K for x > 0.2. Temperature-dependent specific heat data at low temperatures for La1-xCexPt4Ge12 show a change from power-law to exponential behavior, which may be an indication for multi-band superconductivity in LaPt4Ge12. A similar crossover was observed in the Pr1-xCexPt4Ge12 system. However, the suppression rates of the superconducting transition temperatures, Tc(x), in the two systems are quite disparate, indicating a difference in the nature of superconductivity, which is conventional in LaPt4Ge12 and unconventional in PrPt4Ge12. In comparison, a nearly linear and smooth evolution of Tc with increasing Th was observed in the La1-xThxPt4Ge12 system, with no change of the superconducting energy gap in the temperature dependence of the specific heat, suggesting similar types of superconductivity in both the LaPt4Ge12 and ThPt4Ge12 compounds.
- Authors:
-
- Univ. of California, San Diego, CA (United States). Dept. of Physics, and Center for Advanced Nanoscience, and Materials Science and Engineering Program
- Univ. of California, San Diego, CA (United States). Dept. of Physics, and Center for Advanced Nanoscience
- Univ. of California, San Diego, CA (United States). Center for Advanced Nanoscience, and Materials Science and Engineering Program
- Publication Date:
- Research Org.:
- Univ. of California, San Diego, CA (United States)
- Sponsoring Org.:
- National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1418612
- Alternate Identifier(s):
- OSTI ID: 1314344
- Grant/Contract Number:
- FG02-04ER46105; DMR 1206553
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 9; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Huang, K., Yazici, D., White, B. D., Jeon, I., Breindel, A. J., Pouse, N., and Maple, M. B. Superconducting and normal state properties of the systems La1-xMxPt4Ge12 (M=Ce,Th). United States: N. p., 2016.
Web. doi:10.1103/PhysRevB.94.094501.
Huang, K., Yazici, D., White, B. D., Jeon, I., Breindel, A. J., Pouse, N., & Maple, M. B. Superconducting and normal state properties of the systems La1-xMxPt4Ge12 (M=Ce,Th). United States. https://doi.org/10.1103/PhysRevB.94.094501
Huang, K., Yazici, D., White, B. D., Jeon, I., Breindel, A. J., Pouse, N., and Maple, M. B. Thu .
"Superconducting and normal state properties of the systems La1-xMxPt4Ge12 (M=Ce,Th)". United States. https://doi.org/10.1103/PhysRevB.94.094501. https://www.osti.gov/servlets/purl/1418612.
@article{osti_1418612,
title = {Superconducting and normal state properties of the systems La1-xMxPt4Ge12 (M=Ce,Th)},
author = {Huang, K. and Yazici, D. and White, B. D. and Jeon, I. and Breindel, A. J. and Pouse, N. and Maple, M. B.},
abstractNote = {Electrical resistivity, magnetization, and specific heat measurements were performed on polycrystalline samples of the filled-skutterudite systems La1-xMxPt4Ge12 (M = Ce, Th). Superconductivity in LaPt4Ge12 was quickly suppressed with Ce substitution and no evidence for superconductivity was found down to 1.1 K for x > 0.2. Temperature-dependent specific heat data at low temperatures for La1-xCexPt4Ge12 show a change from power-law to exponential behavior, which may be an indication for multi-band superconductivity in LaPt4Ge12. A similar crossover was observed in the Pr1-xCexPt4Ge12 system. However, the suppression rates of the superconducting transition temperatures, Tc(x), in the two systems are quite disparate, indicating a difference in the nature of superconductivity, which is conventional in LaPt4Ge12 and unconventional in PrPt4Ge12. In comparison, a nearly linear and smooth evolution of Tc with increasing Th was observed in the La1-xThxPt4Ge12 system, with no change of the superconducting energy gap in the temperature dependence of the specific heat, suggesting similar types of superconductivity in both the LaPt4Ge12 and ThPt4Ge12 compounds.},
doi = {10.1103/PhysRevB.94.094501},
journal = {Physical Review B},
number = 9,
volume = 94,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2016},
month = {Thu Sep 01 00:00:00 EDT 2016}
}
Web of Science
Figures / Tables:
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