skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Crossover and coexistence of superconductivity and antiferromagnetism in the filled-skutterudite system Pr 1 - x Eu x Pt 4 Ge 12

Abstract

The superconducting and normal-state properties of the filled-skutterudite system Pr 1-xEu xPt 4Ge 12 were studied. Polycrystalline samples were investigated via x-ray diffraction, electrical resistivity, magnetic susceptibility, and specific-heat measurements. Upon Eu substitution, we observed a crossover from superconducting to antiferromagnetic states with a region where both states coexist. Here, in the superconducting region, the specific-heat data exhibit a change of temperature dependence, suggesting an evolution from a nodal to a nodeless superconducting energy gap or a suppression of multiband superconductivity. This change is relatively slower than those reported for different substituent ions, suggesting that paramagnetic impurities have a weaker pair-breaking effect on unconventional superconductivity in PrPt 4Ge 12. In the normal state, an evolution from Fermi-liquid to non-Fermi-liquid behavior was observed, accompanied by the coexistence of superconductivity and antiferromagnetism, suggesting that the underlying electronic structure is primarily responsible for the complex physical phenomena found in this system.

Authors:
 [1];  [2];  [2];  [3];  [4];  [4];  [5];  [1]
  1. Univ. of California, San Diego, CA (United States). Materials Science and Engineering Program. Center for Advanced Nanoscience
  2. Univ. of California, San Diego, CA (United States). Center for Advanced Nanoscience. Dept. of Physics
  3. California State Univ., Fresno, CA (United States). Dept. of Physics
  4. Kent State Univ., Kent, OH (United States). Dept. of Physics
  5. Univ. of California, San Diego, CA (United States). Dept. of Physics
Publication Date:
Research Org.:
Univ. of California, San Diego, CA (United States); California State Univ., Fresno, CA (United States); Kent State Univ., Kent, OH (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1418614
Alternate Identifier(s):
OSTI ID: 1353278
Grant/Contract Number:  
FG02-04ER46105; DMR 1206553; DMR 1506677; DMR 1505826
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 95; Journal Issue: 13; 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; antiferromagnetism; phase transitions; superconductivity

Citation Formats

Jeon, I., Ran, S., Breindel, A. J., Ho, P.-C., Adhikari, R. B., Almasan, C. C., Luong, B., and Maple, M. B.. Crossover and coexistence of superconductivity and antiferromagnetism in the filled-skutterudite system Pr1-xEuxPt4Ge12. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.134517.
Jeon, I., Ran, S., Breindel, A. J., Ho, P.-C., Adhikari, R. B., Almasan, C. C., Luong, B., & Maple, M. B.. Crossover and coexistence of superconductivity and antiferromagnetism in the filled-skutterudite system Pr1-xEuxPt4Ge12. United States. doi:10.1103/PhysRevB.95.134517.
Jeon, I., Ran, S., Breindel, A. J., Ho, P.-C., Adhikari, R. B., Almasan, C. C., Luong, B., and Maple, M. B.. Wed . "Crossover and coexistence of superconductivity and antiferromagnetism in the filled-skutterudite system Pr1-xEuxPt4Ge12". United States. doi:10.1103/PhysRevB.95.134517. https://www.osti.gov/servlets/purl/1418614.
@article{osti_1418614,
title = {Crossover and coexistence of superconductivity and antiferromagnetism in the filled-skutterudite system Pr1-xEuxPt4Ge12},
author = {Jeon, I. and Ran, S. and Breindel, A. J. and Ho, P.-C. and Adhikari, R. B. and Almasan, C. C. and Luong, B. and Maple, M. B.},
abstractNote = {The superconducting and normal-state properties of the filled-skutterudite system Pr1-xEuxPt4Ge12 were studied. Polycrystalline samples were investigated via x-ray diffraction, electrical resistivity, magnetic susceptibility, and specific-heat measurements. Upon Eu substitution, we observed a crossover from superconducting to antiferromagnetic states with a region where both states coexist. Here, in the superconducting region, the specific-heat data exhibit a change of temperature dependence, suggesting an evolution from a nodal to a nodeless superconducting energy gap or a suppression of multiband superconductivity. This change is relatively slower than those reported for different substituent ions, suggesting that paramagnetic impurities have a weaker pair-breaking effect on unconventional superconductivity in PrPt4Ge12. In the normal state, an evolution from Fermi-liquid to non-Fermi-liquid behavior was observed, accompanied by the coexistence of superconductivity and antiferromagnetism, suggesting that the underlying electronic structure is primarily responsible for the complex physical phenomena found in this system.},
doi = {10.1103/PhysRevB.95.134517},
journal = {Physical Review B},
number = 13,
volume = 95,
place = {United States},
year = {Wed Apr 26 00:00:00 EDT 2017},
month = {Wed Apr 26 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share: