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Title: Competing magnetic orders in the superconducting state of heavy-fermion CeRhIn 5

Applied pressure drives the heavy-fermion antiferromagnet CeRhIn5 toward a quantum critical point that becomes hidden by a dome of unconventional superconductivity. Magnetic fields suppress this superconducting dome, unveiling the quantum phase transition of local character. Here in this paper, we show that 5% magnetic substitution at the Ce site in CeRhIn 5, either by Nd or Gd, induces a zero-field magnetic instability inside the superconducting state. This magnetic state not only should have a different ordering vector than the high-field local-moment magnetic state, but it also competes with the latter, suggesting that a spin-density-wave phase is stabilized in zero field by Nd and Gd impurities, similarly to the case of Ce 0.95Nd 0.05CoIn 5. Supported by model calculations, we attribute this spin-density wave instability to a magnetic-impurity-driven condensation of the spin excitons that form inside the unconventional superconducting state.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [1] ;  [3] ;  [2] ;  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Minnesota, Minneapolis, MN (United States). School of Physics and Astronomy
  3. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
Publication Date:
Report Number(s):
LA-UR-16-21979
Journal ID: ISSN 0027-8424
Grant/Contract Number:
AC52-06NA25396; SC0012336
Type:
Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 114; Journal Issue: 21; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences, Washington, DC (United States)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Material Science; magnetism; superconductivity; heavy fermions
OSTI Identifier:
1356271
Alternate Identifier(s):
OSTI ID: 1392869

Rosa, P. F. S., Kang, J., Luo, Yongkang, Wakeham, N., Bauer, E. D., Ronning, F., Fisk, Z., Fernandes, R. M., and Thompson, J. D.. Competing magnetic orders in the superconducting state of heavy-fermion CeRhIn5. United States: N. p., Web. doi:10.1073/pnas.1703016114.
Rosa, P. F. S., Kang, J., Luo, Yongkang, Wakeham, N., Bauer, E. D., Ronning, F., Fisk, Z., Fernandes, R. M., & Thompson, J. D.. Competing magnetic orders in the superconducting state of heavy-fermion CeRhIn5. United States. doi:10.1073/pnas.1703016114.
Rosa, P. F. S., Kang, J., Luo, Yongkang, Wakeham, N., Bauer, E. D., Ronning, F., Fisk, Z., Fernandes, R. M., and Thompson, J. D.. 2017. "Competing magnetic orders in the superconducting state of heavy-fermion CeRhIn5". United States. doi:10.1073/pnas.1703016114.
@article{osti_1356271,
title = {Competing magnetic orders in the superconducting state of heavy-fermion CeRhIn5},
author = {Rosa, P. F. S. and Kang, J. and Luo, Yongkang and Wakeham, N. and Bauer, E. D. and Ronning, F. and Fisk, Z. and Fernandes, R. M. and Thompson, J. D.},
abstractNote = {Applied pressure drives the heavy-fermion antiferromagnet CeRhIn5 toward a quantum critical point that becomes hidden by a dome of unconventional superconductivity. Magnetic fields suppress this superconducting dome, unveiling the quantum phase transition of local character. Here in this paper, we show that 5% magnetic substitution at the Ce site in CeRhIn5, either by Nd or Gd, induces a zero-field magnetic instability inside the superconducting state. This magnetic state not only should have a different ordering vector than the high-field local-moment magnetic state, but it also competes with the latter, suggesting that a spin-density-wave phase is stabilized in zero field by Nd and Gd impurities, similarly to the case of Ce0.95Nd0.05CoIn5. Supported by model calculations, we attribute this spin-density wave instability to a magnetic-impurity-driven condensation of the spin excitons that form inside the unconventional superconducting state.},
doi = {10.1073/pnas.1703016114},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 21,
volume = 114,
place = {United States},
year = {2017},
month = {5}
}