Unusual Friedel and RKKY responses in 3D quadratic band-touching Luttinger semimetals

ORAL

Abstract

We study the response of Luttinger semimetals, such as alpha-Sn, HgSe, HgTe, YPtBi and Pr2Ir2O7, to charge and magnetic impurities. In these materials the strong spin-orbit coupling and quadratic band-touching lead to unusual Friedel and Ruderman-Kittel-Kasuya-Yoshida (RKKY) oscillations, as well as an asymmetry in the response upon electron or hole doping. We also examine the magnetic Pauli and Landau susceptibilities, which differ from those of regular metals. These results motivate the study of Kondo physics in Luttinger semimetals, where novel quantum phases can arise due to spin-orbit coupling.

*This project is funded by a grant from Fondation Courtois, a Discovery Grant and Canada Graduate Scholarships - Master's Program from NSERC, a Programs of scholarships of 2nd and 3rd cycles-Master from FRQNT, a Canada Research Chair, and a "Etablissement de nouveaux chercheurs et de nouvelles chercheuses universitaires" grant from FRQNT.

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Presenters

  • Louis J. Godbout

    • Universite de Montreal

Authors

  • Louis J. Godbout

    • Universite de Montreal

  • Serguei Tchoumakov

    • Institut Néel, CNRS and Université Grenoble Alpes
    • NÉEL Institute, CNRS
    • Institut Neel

  • William Witczak-Krempa

    • Universite de Montreal
    • physics, Université de Montréal
    • Université de Montréal