Localized-to-itinerant transition preceding antiferromagnetic quantum critical point and gapless superconductivity in CeRh0.5Ir0.5In5
Abstract
A fundamental problem posed from the study of correlated electron compounds, of which heavy-fermion systems are prototypes, is the need to understand the physics of states near a quantum critical point (QCP). At a QCP, magnetic order is suppressed continuously to zero temperature and unconventional superconductivity often appears. Here, we report pressure (P)-dependent 115In nuclear quadrupole resonance (NQR) measurements on heavy-fermion antiferromagnet CeRh0.5Ir0.5In5. These experiments reveal an antiferromagnetic (AF) QCP at \({P}_{{\rm{c}}}^{{\rm{AF}}}=1.2\) GPa where a dome of superconductivity reaches a maximum transition temperature Tc. Preceding \({P}_{{\rm{c}}}^{{\rm{AF}}}\), however, the NQR frequency νQ undergoes an abrupt increase at \({P}_{{\rm{c}}}^{{\rm{* }}}\) = 0.8 GPa in the zero-temperature limit, indicating a change from localized to itinerant character of cerium’s f-electron and associated small-to-large change in the Fermi surface. At \({P}_{{\rm{c}}}^{{\rm{AF}}}\) where Tc is optimized, there is an unusually large fraction of gapless excitations well below Tc that implicates spin-singlet, odd-frequency pairing symmetry.
- Authors:
-
- Okayama Univ. (Japan)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Okayama Univ. (Japan); Chinese Academy of Sciences (CAS), Beijing (China)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); Ministry of Education, Culture, Sports, Science and Technology (MEXT); National Natural Science Foundation of China (NSFC); Ministry of Science and Technology of the People’s Republic of China (MOST); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1660597
- Report Number(s):
- LA-UR-19-30144
Journal ID: ISSN 2399-3650; TRN: US2203531
- Grant/Contract Number:
- 89233218CNA000001; JP19K03747; JP23102717; JP25400374; 11634015; 2016YFA0300300; 2017YFA0302904; 2017YFA0303103
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Communications Physics
- Additional Journal Information:
- Journal Volume: 3; Journal Issue: 1; Journal ID: ISSN 2399-3650
- Publisher:
- Springer Nature
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Condensed-matter physics; Phase transitions and critical phenomena; Superconducting properties and materials
Citation Formats
Kawasaki, Shinji, Oka, Toshihide, Sorime, Akira, Kogame, Yuji, Uemoto, Kazuhiro, Matano, Kazuaki, Guo, Jing, Cai, Shu, Sun, Liling, Sarrao, John Louis, Thompson, Joe David, and Zheng, Guo-qing. Localized-to-itinerant transition preceding antiferromagnetic quantum critical point and gapless superconductivity in CeRh0.5Ir0.5In5. United States: N. p., 2020.
Web. doi:10.1038/s42005-020-00418-x.
Kawasaki, Shinji, Oka, Toshihide, Sorime, Akira, Kogame, Yuji, Uemoto, Kazuhiro, Matano, Kazuaki, Guo, Jing, Cai, Shu, Sun, Liling, Sarrao, John Louis, Thompson, Joe David, & Zheng, Guo-qing. Localized-to-itinerant transition preceding antiferromagnetic quantum critical point and gapless superconductivity in CeRh0.5Ir0.5In5. United States. https://doi.org/10.1038/s42005-020-00418-x
Kawasaki, Shinji, Oka, Toshihide, Sorime, Akira, Kogame, Yuji, Uemoto, Kazuhiro, Matano, Kazuaki, Guo, Jing, Cai, Shu, Sun, Liling, Sarrao, John Louis, Thompson, Joe David, and Zheng, Guo-qing. Thu .
"Localized-to-itinerant transition preceding antiferromagnetic quantum critical point and gapless superconductivity in CeRh0.5Ir0.5In5". United States. https://doi.org/10.1038/s42005-020-00418-x. https://www.osti.gov/servlets/purl/1660597.
@article{osti_1660597,
title = {Localized-to-itinerant transition preceding antiferromagnetic quantum critical point and gapless superconductivity in CeRh0.5Ir0.5In5},
author = {Kawasaki, Shinji and Oka, Toshihide and Sorime, Akira and Kogame, Yuji and Uemoto, Kazuhiro and Matano, Kazuaki and Guo, Jing and Cai, Shu and Sun, Liling and Sarrao, John Louis and Thompson, Joe David and Zheng, Guo-qing},
abstractNote = {A fundamental problem posed from the study of correlated electron compounds, of which heavy-fermion systems are prototypes, is the need to understand the physics of states near a quantum critical point (QCP). At a QCP, magnetic order is suppressed continuously to zero temperature and unconventional superconductivity often appears. Here, we report pressure (P)-dependent 115In nuclear quadrupole resonance (NQR) measurements on heavy-fermion antiferromagnet CeRh0.5Ir0.5In5. These experiments reveal an antiferromagnetic (AF) QCP at \({P}_{{\rm{c}}}^{{\rm{AF}}}=1.2\) GPa where a dome of superconductivity reaches a maximum transition temperature Tc. Preceding \({P}_{{\rm{c}}}^{{\rm{AF}}}\), however, the NQR frequency νQ undergoes an abrupt increase at \({P}_{{\rm{c}}}^{{\rm{* }}}\) = 0.8 GPa in the zero-temperature limit, indicating a change from localized to itinerant character of cerium’s f-electron and associated small-to-large change in the Fermi surface. At \({P}_{{\rm{c}}}^{{\rm{AF}}}\) where Tc is optimized, there is an unusually large fraction of gapless excitations well below Tc that implicates spin-singlet, odd-frequency pairing symmetry.},
doi = {10.1038/s42005-020-00418-x},
journal = {Communications Physics},
number = 1,
volume = 3,
place = {United States},
year = {Thu Aug 27 00:00:00 EDT 2020},
month = {Thu Aug 27 00:00:00 EDT 2020}
}
Web of Science
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