| Autor: |
Kazuyuki Omasa, Takuya Komoda, Yusuke Nakamura, Eiichi Matsuoka, Hisashi Kotegawa, Hideki Tou, Takahiro Sakurai, Hitoshi Ohta, Ai Nakamura, Yoshiya Homma, Dai Aoki, Daisuke Satoh, Mitsuhiro Yoshida, Sanu Mishra, Ilya Sheikin, Hisatomo Harima, Hitoshi Sugawara |
| Zdroj: |
Journal of the Physical Society of Japan; 3/15/2024, Vol. 93 Issue 3, p1-6, 6p |
| Abstrakt: |
CeIr2 was reported as a valence fluctuation compound with a superconducting transition temperature of ~0.3 K. To investigate its electronic and superconducting properties, we measured the electrical resistivity, magnetic susceptibility, and de Haas-van Alphen (dHvA) effect at low temperatures cooled to ~30mK and in high magnetic fields up to 36 T. The upper critical field (µ0Hc2 = 0.23 T) determined by the electrical resistivity under the magnetic field and the electron-phonon coupling constant (λep = 0.39) estimated from the Debye temperature suggested a weak-coupling BCStype superconductivity. The dHvA effect measurements mapped the Fermi surface in detail. The dHvA branches with the frequencies of F = 122-2180 T and the effective masses of m*c = 0:83{2:4m0 (m0: rest mass of an electron) were observed. These were reasonably explained by the band-structure calculation based on the full potential linearized augmented-plane-wave method within the local density approximation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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