@article{a355d1b8159443369c0d0eb34a88c8e0,
title = "Quantum limit transport and destruction of the Weyl nodes in TaAs",
abstract = "Weyl fermions are a recently discovered ingredient for correlated states of electronic matter. A key difficulty has been that real materials also contain non-Weyl quasiparticles, and disentangling the experimental signatures has proven challenging. Here we use magnetic fields up to 95 T to drive the Weyl semimetal TaAs far into its quantum limit, where only the purely chiral 0th Landau levels of the Weyl fermions are occupied. We find the electrical resistivity to be nearly independent of magnetic field up to 50 T: unusual for conventional metals but consistent with the chiral anomaly for Weyl fermions. Above 50 T we observe a two-order-of-magnitude increase in resistivity, indicating that a gap opens in the chiral Landau levels. Above 80 T we observe strong ultrasonic attenuation below 2 K, suggesting a mesoscopically textured state of matter. These results point the way to inducing new correlated states of matter in the quantum limit of Weyl semimetals.",
author = "Ramshaw, {B. J.} and Modic, {K. A.} and Arkady Shekhter and Yi Zhang and Kim, {Eun Ah} and Moll, {Philip J.W.} and Bachmann, {Maja D.} and Chan, {M. K.} and Betts, {J. B.} and F. Balakirev and A. Migliori and Ghimire, {N. J.} and Bauer, {E. D.} and F. Ronning and McDonald, {R. D.}",
note = "Funding Information: This work was performed at the National High Magnetic Field Laboratory, which is supported by National Science Foundation Cooperative Agreement No. DMR-1157490 and the State of Florida. E.D.B, F.R., and R.D.M. acknowledge funding from the LANL LDRD DR20160085 {\textquoteleft}Topology and Strong Correlations{\textquoteright}. B.J.R. acknowledges funding from LANL LDRD 20160616ECR {\textquoteleft}New States of Matter in Weyl Semimetals{\textquoteright}. M.K.C. acknowledges funding from the U.S. Department of Energy Office of Basic Energy Sciences Science at 100 T program. P.J.M. is supported by the Max-Planck-Society and the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 research and innovation programme (grant agreement No. 715730). M.D.B. acknowledges studentship funding from EPSRC under Grant No. EP/I007002/1. Y.Z. was supported in part by NSF DMR-1308089 and E.A.K. was supported in part by National Science Foundation (Platform for the Accelerated Realization, Analysis, and Discovery of Interface Materials (PARADIM)) under Cooperative Agreement No. DMR-1539918. Publisher Copyright: {\textcopyright} 2018 The Author(s).",
year = "2018",
month = dec,
day = "1",
doi = "10.1038/s41467-018-04542-9",
language = "English",
volume = "9",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Nature Publishing Group",
number = "1",
}