Enhancement of the cyclotron effective mass in U0.03Th0.97Ru2Si2

International Conference on Strongly Correlated Electron Systems 2014

Haga, Yoshinori^1 ; Matsumoto, Yuji^2 ; Tateiwa, Naoyuki^1 ; Yamamoto, Etsuji^1 ; Kimura, Noriaki^3 ; Yamamura, Tomoo^4 ; Fisk, Zachary^1,5

Advanced Science Research Center, Japan Atomic Energy Agency, Ibaraki-Tokai

319-1195, Japan^1

Department of Engineering Physics, Electronics and Mechanics, Graduate School of Engineering, Nagoya Institute of Technology, Aichi, Nagoya

466-8555, Japan^2

Graduate School of Science, Center for Low Temperature Science, Tohoku University, Miyagi, Sendai

980-8578, Japan^3

Institute for Materials Research, Tohoku University, Miyagi, Sendai

980-8577, Japan^4

Department of Physics and Astronomy, University of California, Irvine

CA

92697, United States^5

关键词: Cyclotron-effective mass;    De Haas-van Alphen (dHvA);    Mass renormalizations;    Principal axes;    Quantum oscillations;    Reference compounds;    Single crystal samples;    Strong scatterings;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/592/1/012036/pdf
DOI  :  10.1088/1742-6596/592/1/012036

来源: IOP

【 摘 要 】

Electronic states of a dilute uranium alloy U0.03Th0.97Ru2Si2have 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.