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

Title: Vortexlike excitations in the heavy-fermion superconductor CeIrIn 5

Abstract

Here, we report a systematic study of temperature- and field-dependent charge (ρ) and entropy (S) transport in the heavy-fermion superconductor CeIrIn5. Its large positive thermopower Sxx is typical of Ce-based Kondo lattice systems, and strong electronic correlations play an important role in enhancing the Nernst signal Sxy. By separating the off-diagonal Peltier coefficient αxy from Sxy, we find that αxy becomes positive and greatly enhanced at temperatures well above the bulk Tc. Compared with the nonmagnetic analog LaIrIn5, these results suggest vortexlike excitations in a precursor state to unconventional superconductivity in CeIrIn5. This study sheds light on the similarity of heavy-fermion and cuprate superconductors and on the possibility of states not characterized by the amplitude of an order parameter.

Authors:
 [1];  [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1255264
Alternate Identifier(s):
OSTI ID: 1251278
Report Number(s):
LA-UR-15-29500
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US1601733
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 20; 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; 36 MATERIALS SCIENCE

Citation Formats

Luo, Yongkang, Rosa, P. F. S., Bauer, E. D., and Thompson, J. D. Vortexlike excitations in the heavy-fermion superconductor CeIrIn5. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.201102.
Luo, Yongkang, Rosa, P. F. S., Bauer, E. D., & Thompson, J. D. Vortexlike excitations in the heavy-fermion superconductor CeIrIn5. United States. doi:10.1103/PhysRevB.93.201102.
Luo, Yongkang, Rosa, P. F. S., Bauer, E. D., and Thompson, J. D. Thu . "Vortexlike excitations in the heavy-fermion superconductor CeIrIn5". United States. doi:10.1103/PhysRevB.93.201102. https://www.osti.gov/servlets/purl/1255264.
@article{osti_1255264,
title = {Vortexlike excitations in the heavy-fermion superconductor CeIrIn5},
author = {Luo, Yongkang and Rosa, P. F. S. and Bauer, E. D. and Thompson, J. D.},
abstractNote = {Here, we report a systematic study of temperature- and field-dependent charge (ρ) and entropy (S) transport in the heavy-fermion superconductor CeIrIn5. Its large positive thermopower Sxx is typical of Ce-based Kondo lattice systems, and strong electronic correlations play an important role in enhancing the Nernst signal Sxy. By separating the off-diagonal Peltier coefficient αxy from Sxy, we find that αxy becomes positive and greatly enhanced at temperatures well above the bulk Tc. Compared with the nonmagnetic analog LaIrIn5, these results suggest vortexlike excitations in a precursor state to unconventional superconductivity in CeIrIn5. This study sheds light on the similarity of heavy-fermion and cuprate superconductors and on the possibility of states not characterized by the amplitude of an order parameter.},
doi = {10.1103/PhysRevB.93.201102},
journal = {Physical Review B},
number = 20,
volume = 93,
place = {United States},
year = {2016},
month = {5}
}

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

Save / Share: