Heavy fermions and unconventional superconductivity in high-quality single crystals of rare-earth and actinide compounds

Yoshichika Ōnuki, Rikio Settai, Kiyohiro Sugiyama, Tetsuya Takeuchi, Fuminori Honda, Yoshinori Haga, Etsuji Yamamoto, Tatsuma D. Matsuda, Naoyuki Tateiwa, Dai Aoki, Ilya Sheikin, Hisatomo Harima

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1 Citation (Scopus)

Abstract

The f-electron system in rare-earth and actinide compounds exhibit a variety of characteristic properties including heavy fermions and unconventional superconductivity. The Fermi surface properties in rare-earth and actinide compounds are clarified by the de Haas-van Alphen experiments on the basis of the results of energy band calculations. The effect of pressure on the electronic states of CeRhIn 5 , CeIrSi 3 , and YbIr 2 Zn 20 is studied in magnetic fields. An electronic instability, including unconventional superconductivity, occurs at 2.4 GPa in CeRhIn 5 and 2.6 GPa in CeIrSi 3 . An abrupt non-linear increase in the magnetization, namely, a metamagnetic behavior, is found in the heavy fermion compounds, including YbT 2 Zn 20 (T: Co, Rh, Ir). A super-heavy fermion state with a specific heat coefficient of 10 J/(K 2 ·mol) is realized in YbIr 2 Zn 20 under pressure.

Original languageEnglish
Pages (from-to)409-415
Number of pages7
JournalJournal of the Korean Physical Society
Volume63
Issue number3
DOIs
Publication statusPublished - 2013 Aug

Keywords

  • Antiferromagnetism
  • Electrical resistivity
  • Heavy fermion system
  • High pressure
  • Metamagnetism
  • Superconductivity
  • de Haas - van Alphen effect

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Ōnuki, Y., Settai, R., Sugiyama, K., Takeuchi, T., Honda, F., Haga, Y., Yamamoto, E., Matsuda, T. D., Tateiwa, N., Aoki, D., Sheikin, I., & Harima, H. (2013). Heavy fermions and unconventional superconductivity in high-quality single crystals of rare-earth and actinide compounds. Journal of the Korean Physical Society, 63(3), 409-415. https://doi.org/10.3938/jkps.63.409