Abstract
Electronic states of a dilute uranium alloy U0.03Th0.97Ru2Si2 have been investigated by using de Haas-van Alphen (dHvA) measurements on single crystal samples. Quantum oscillations were successfully observed for the field along the principal axes. The dHvA frequency of the observed branches roughly agrees with those of the reference compound ThRu2Si2, indicating the change of Fermi surface volume is not significant. On the other hand, the dHvA amplitude is strongly diminished compared to ThRu2Si2. Furthermore, cyclotron effective masses for corresponding branches are strongly enhanced. The latter effects are indicative of the strong scattering as well as the mass renormalization due to 5f moments.
Highlights
Electron correlations and their effect on physical properties are one of the central issues in condensed-matter physics
The low temperature bulk properties of ThRu2Si2 doped with dilute uranium have been investigated on single crystals [5]
The paramagnetic susceptibility was measured in a SQUID magnetometer (Quantum Design MPMS). All these analyses show that dilute uranium is incorporated in the host ThRu2Si2
Summary
Electron correlations and their effect on physical properties are one of the central issues in condensed-matter physics. The low temperature bulk properties of ThRu2Si2 doped with dilute uranium have been investigated on single crystals [5]. A deviation from Curie-Weiss law, enhancement of the electronic specific heat coefficient γ and anomalous decrease of the electrical resistivity were observed.
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