New Superconducting and Magnetic Phases Emerge on the Verge of Antiferromagnetism in CeIn\(_3\)

We report the discovery of new superconducting and novel magnetic phases in CeIn\(_3\) on the verge of antiferromagnetism (AFM) under pressure (\(P\)) through the In-nuclear quadrupole resonance (NQR) measurements. We have found a \(P\)-induced phase separation of AFM and paramagnetism (PM) without...

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Published inarXiv.org
Main Authors Kawasaki, Shinji, Mito, Takeshi, Kawasaki, Yu, Kotegawa, Hisashi, Guo-qing, Zheng, Kitaoka, Yoshio, Shishido, Hiroaki, Araki, Shingo, Settai, Rikio, Ōnuki, Yoshichika
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 16.04.2004
Subjects
Antiferromagnetism
Cooper pairs
Fermions
Nuclear quadrupole resonance
Paramagnetism
Phase separation
Phase transitions
Quadrupoles
Superconductivity
Superconductors
Variations
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Summary:We report the discovery of new superconducting and novel magnetic phases in CeIn\(_3\) on the verge of antiferromagnetism (AFM) under pressure (\(P\)) through the In-nuclear quadrupole resonance (NQR) measurements. We have found a \(P\)-induced phase separation of AFM and paramagnetism (PM) without any trace for a quantum phase transition in CeIn\(_3\). A new type of superconductivity (SC) was found in \(P=2.28-2.5\) GPa to coexist with AFM that is magnetically separated from PM where the heavy fermion SC takes place. We propose that the magnetic excitations such as spin-density fluctuations induced by the first-order magnetic phase transition might mediate attractive interaction to form Cooper pairs.
ISSN:2331-8422
DOI:10.48550/arxiv.0404376