Time reversal and lattice symmetry breaking in Nd2Ir2O7 observed by Raman scattering.
ORAL
Abstract
Abstract body: Nd2Ir2O7 is a semimetal compound, in which a competition between spin-orbit coupling and electronic correlations may lead to exotic physics. In particular, a Weyl semimetal state was suggested for this material. Using polarized Raman scattering to study this material, we can distinguish between magnetic excitations and transitions over the electronic gap in the insulating regime below 30 K. We follow the evolution of these features on. This allows us to identify two temperature regimes, between 30 and approximately 15 K where we observe an electronic gap and developing of magnetic order related to iridium spins, and the lower temperature regime where we observe evidence of broken symmetry of the lattice.
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Presenters
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Natalia Drichko
Johns Hopkins University, Department of Physics and Astronomy, Johns Hopkins University
Authors
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Yuanyuan Xu
Johns Hopkins University, Department of Physics and Astronomy, Johns Hopkins University
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Jeremie Teyssier
Department of Quantum Matter Physics, University of Geneva
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Takumi Ohtsuki
University of Tokyo, Institute for Solid State Physics
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Satoru Nakatsuji
University of Tokyo, Institute for Solid State Physics, University of Tokyo
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Dirk Van Der Marel
Department of Quantum Matter Physics, University of Geneva
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Natalia Drichko
Johns Hopkins University, Department of Physics and Astronomy, Johns Hopkins University