Heavy fermions and unconventional superconductivity in high-quality single crystals of rare-earth and actinide compounds
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...
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Veröffentlicht in: | Journal of the Korean Physical Society 2013, 63(3), , pp.409-415 |
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Hauptverfasser: | , , , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
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Zusammenfassung: | 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. |
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ISSN: | 0374-4884 1976-8524 |
DOI: | 10.3938/jkps.63.409 |