Lorentz-boost-driven magneto-optics in Dirac matter

ORAL

Abstract

Optical and magneto-optical methods can determine experimentally the energy band gap with a great precision. Here we show that such conventional methods, applied with great success to many materials in the past, do not work in topological Dirac semimetals with a dispersive nodal line. There, the optically deduced band gap depends on how the magnetic field is oriented with respect to the crystal axes. Such highly unusual behaviour is explained in terms of band-gap renormalization driven by Lorentz boosts, accompanied by an interpretation in the language of condensed matter physics.

*The work has been supported by- ANR DIRAC3D project (ANR-17-CE30-0023) and exchange programme PHC ORCHID (47044XE)- CNRS through IRP "TeraMIR" and ANR Colector (ANR19-CE30-0032).We also acknowledges funding from- Swiss National Science Foundation through Project No. PP00P2-170544- CeNIKS project co-financed by the Croatian Government and the EU through the ERDF -Competitiveness and Cohesion Operational Program (Grant No. KK.01.1.1.02.0013)- the Ministry of Science and Technology in Taiwan under Project MOST-110-2112-M-001065-MY3, and Academia Sinica for the budget of AS-iMate-109-13- NSF Grant No. DMR-1914451, and the Research Corporation for Science Advancement through a Cottrell SEED award.

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Publication: arXiv:2110.07266

Presenters

  • Xin Lu

    • LPS Orsay, Université Paris-Saclay / ShanghaiTech University

Authors

  • Xin Lu

    • LPS Orsay, Université Paris-Saclay / ShanghaiTech University

  • Jan Wyzula

    • LNCMI-EMFL (CNRS)

  • Milan Orlita

    • LNCMI-EMFL (CNRS) / Charles University

  • Dibya K Murkehjee

    • Department of Physics, Indiana University, Bloomington, IN 47405
    • Indiana University Bloomington
    • LPS Orsay, Université Paris-Saclay / Indiana University

  • Ivan Mohelský

    • LNCMI-EMFL (CNRS)

  • Florian Le Mardelé

    • University of Fribourg

  • Raman Sankar

    • Academia Sinica
    • Institute of Physics, Academia Sinica

  • Benjamin A Piot

    • LNCMI-EMFL (CNRS)

  • David Santos-Cottin

    • University of Fribourg

  • Wei-Li Lee

    • Academia Sinica

  • Marek Potemski

    • LNCMI-EMFL (CNRS) / University of Warsaw

  • Yuriy Krupko

    • LNCMI-EMFL (CNRS) / Université de Montpellier

  • Mark O Goerbig

    • LPS Orsay, Université Paris-Saclay

  • Jiri Novák

    • Masaryk University

  • Mario Novak

    • University of Zagreb

  • Ana Akrap

    • University of Fribourg

  • Xin Lu

    • LPS Orsay, Université Paris-Saclay / ShanghaiTech University