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Fermi surface study in uranium-based intermetallic compounds

Haga, Yoshinori ; Yamamoto, Etsuji ; Tokiwa, Yoshifumi; Aoki, Dai*; Inada, Yoshihiko*; Settai, Rikio*; Maehira, Takahiro; Yamagami, Hiroshi*; Harima, Hisatomo*; Onuki, Yoshichika

Fermi surfaces of uranium compounds are investigated by de Haas-van Alphen (dHvA) effect. Band calculations well reproduce the Fermi surfaces of non-magnetic itinerant systems such as USi$$_{3}$$, UC, UAl$$_{3}$$. Fermi surfaces of the heavy fermion compounds, where the strong correlation between carriers are important, are also explained by band calculations, except for their unusually large mass enhancement. We have also observed dHvA oscillations in the superconducting mixed states in heavy fermion superconductors such as URu$$_{2}$$Si$$_{2}$$, UPd$$_{2}$$Al$$_{3}$$ and CeRu$$_{2}$$. A significan field dependence of cyclotron effective mass and scattering life time were observed.

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