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Fermi-surface topology of the heavy-fermion system Ce_2PtIn_8

机译:重费米系统Ce_2PtIn_8的费米面拓扑

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摘要

Ce_2PtIn_8 is a recently discovered heavy-fermion system structurally related to the well-studied superconductor CeCoIn_5. Here we report on low-temperature de Haas-van Alphen-effect measurements in high magnetic fields in Ce_2PtIn_8 and Pr_2PtIn_8. In addition, we performed band-structure calculations for localized and itinerant Ce-4f electrons in Ce_2PtIn_8. Comparison with the experimental data of Ce_2PtIn_8 and of the 4 f-localized Pr_2PtIn_8 suggests the itinerant character of the Ce-4f electrons. This conclusion is further supported by the observation of effective masses in Ce_2PtI_n8, which are strongly enhanced with up to 26 bare electron masses.
机译:Ce_2PtIn_8是最近发现的重费米子系统,其结构与经过充分研究的超导体CeCoIn_5有关。在这里,我们报告了在Ce_2PtIn_8和Pr_2PtIn_8高磁场中的低温de Haas-van Alphen效应测量。此外,我们对Ce_2PtIn_8中的局部和循环Ce-4f电子进行了能带结构计算。与Ce_2PtIn_8和4个f局部化的Pr_2PtIn_8的实验数据进行比较,表明了Ce-4f电子的流动特性。 Ce_2PtI_n8中的有效质量的观察进一步支持了这一结论,有效质量可通过最多26个裸电子质量得到增强。

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  • 来源
    《Physical review》 |2018年第16期|165120.1-165120.9|共9页
  • 作者单位

    Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany,Institut fuer Festkoerper- und Materialphysik, Technische Universitaet Dresden, 01069 Dresden, Germany;

    Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany,Institut fuer Festkoerper- und Materialphysik, Technische Universitaet Dresden, 01069 Dresden, Germany;

    Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany;

    Laboratoire National des Champs Magnetiques Intenses (LNCM1-EMFL), CNRS, UGA, 38042 Grenoble, France;

    Osaka Prefecture University, Department of Electronics, Mathematics, and Physics, Sakai, Osaka 5998531, Japan;

    Osaka Prefecture University, Department of Electronics, Mathematics, and Physics, Sakai, Osaka 5998531, Japan;

    Graduate School of Science, Kobe University, Kobe 657-8501, Japan;

    Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany,Institut fuer Festkoerper- und Materialphysik, Technische Universitaet Dresden, 01069 Dresden, Germany;

    Laboratoire National des Champs Magnetiques Intenses (LNCM1-EMFL), CNRS, UGA, 38042 Grenoble, France;

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