Negative longitudinal magneto‐resistance of layered crystals taking into account the spin splitting

Figarova, S. R.

doi:10.1002/pssb.200541499

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…Weyl semimetals are particularly interesting since pairs of Weyl nodes with opposite chirality appear as monopole sources and sinks of Berry curvature 12 , 13 . This results in unusual transport properties such as the anomalous Hall effect, extremely large and non-saturating magneto-resistance, the chiral anomaly and negative longitudinal magneto-resistance 14 – 19 . In addition, extremely large nonlinear optical effects such as sum and difference frequency generation, nonlinear DC shift currents (electromagnetic rectification), and photoinduced anomalous Hall effect have been predicted and observed 20 – 25 .…”

Section: Introductionmentioning

confidence: 99%

A Raman probe of phonons and electron–phonon interactions in the Weyl semimetal NbIrTe4

Shojaei

Pournia

et al. 2021

Sci Rep

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There is tremendous interest in measuring the strong electron–phonon interactions seen in topological Weyl semimetals. The semimetal NbIrTe4 has been proposed to be a Type-II Weyl semimetal with 8 pairs of opposite Chirality Weyl nodes which are very close to the Fermi energy. We show using polarized angular-resolved micro-Raman scattering at two excitation energies that we can extract the phonon mode dependence of the Raman tensor elements from the shape of the scattering efficiency versus angle. This van der Waals semimetal with broken inversion symmetry and 24 atoms per unit cell has 69 possible phonon modes of which we measure 19 modes with frequencies and symmetries consistent with Density Functional Theory calculations. We show that these tensor elements vary substantially in a small energy range which reflects a strong variation of the electron–phonon coupling for these modes.

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