High Fermi velocities and small cyclotron masses in LaAlGe
ORAL
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, the 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.
*The work at Brookhaven National Laboratory was supported by U.S. DOE, Office of Science, Office of Basic Energy Sciences under Contract No. DE-SC0012704. A portion of this work was performed at the National High Magnetic Field Laboratory, which was supported by the National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida.
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Publication: Appl. Phys. Lett. 117, 222410 (2020); https://doi.org/10.1063/5.0035445.
Presenters
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Zhixiang Hu
- Stony Brook University (SUNY)