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Title: High Fermi velocities and small cyclotron masses in LaAlGe

Abstract

Here, 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.

Authors:
 [1];  [1];  [2];  [3]; ORCiD logo [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Florida State Univ., Tallahassee, FL (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1756295
Alternate Identifier(s):
OSTI ID: 1730963
Report Number(s):
BNL-220770-2021-JAAM
Journal ID: ISSN 0003-6951; TRN: US2205618
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 117; Journal Issue: 22; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Hu, Zhixiang, Du, Qianheng, Liu, Yu, Graf, D., and Petrovic, Cedomir. High Fermi velocities and small cyclotron masses in LaAlGe. United States: N. p., 2020. Web. doi:10.1063/5.0035445.
Hu, Zhixiang, Du, Qianheng, Liu, Yu, Graf, D., & Petrovic, Cedomir. High Fermi velocities and small cyclotron masses in LaAlGe. United States. https://doi.org/10.1063/5.0035445
Hu, Zhixiang, Du, Qianheng, Liu, Yu, Graf, D., and Petrovic, Cedomir. Mon . "High Fermi velocities and small cyclotron masses in LaAlGe". United States. https://doi.org/10.1063/5.0035445. https://www.osti.gov/servlets/purl/1756295.
@article{osti_1756295,
title = {High Fermi velocities and small cyclotron masses in LaAlGe},
author = {Hu, Zhixiang and Du, Qianheng and Liu, Yu and Graf, D. and Petrovic, Cedomir},
abstractNote = {Here, 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.},
doi = {10.1063/5.0035445},
journal = {Applied Physics Letters},
number = 22,
volume = 117,
place = {United States},
year = {2020},
month = {11}
}

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