High Fermi velocities and small cyclotron masses in LaAlGe

Abstract

We report quantum oscillation measurements of LaAlGe, a Lorentz-violating type-II Weyl semimetal with tilted Weyl cones. Very small quasiparticle masses and very high Fermi velocities were detected at the Fermi surface. Whereas three main frequencies have been observed, angular dependence of two Fermi surface sheets indicates possible two-dimensional (2D) character despite the absence of the 2D structural features such as van der Waals bonds. Such conducting states may offer a good platform for low-dimensional polarized spin current in magnetic RAlGe (R = Ce, Pr) materials.

5 pages, 3 figures

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Cited by in corpus (8)

• Quantum oscillations in Noncentrosymmetric Weyl semimetals RAlSi (R = Sm and Ce)
• Signature of weakly coupled $f$ electrons and conduction electrons in magnetic Weyl semimetal candidates PrAlSi and SmAlSi
• Shubnikov-de Haas Oscillations and Nontrivial Topological State in a New Weyl Semimetal Candidate SmAlSi
• Universal Scaling Behavior of Transport Properties in Non-Magnetic RuO${}_2$
• Crystallographic defects in Weyl semimetal LaAlGe
• Experimental study of transport properties of Weyl semimetal LaAlGe thin films grown by molecular beam epitaxy
• Single crystalline orthorhombic GdAlGe as a rare earth magnetic Dirac nodal-line metal
• Isotropic Dirac fermion and anomalous oscillator strength of zeroth Landau level transition