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arXiv · 1703.09706

Dissolution of topological Fermi arcs in a dirty Weyl semimetal

Robert-Jan Slager·Vladimir Juricic·Bitan Roy
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Abstract

Weyl semimetals (WSMs) have recently attracted a great deal of attention as they provide condensed matter realization of chiral anomaly, feature topologically protected Fermi arc surface states and sustain sharp chiral Weyl quasiparticles up to a critical disorder at which a continuous quantum phase transition (QPT) drives the system into a metallic phase. We here numerically demonstrate that with increasing strength of disorder the Fermi arc gradually looses its sharpness, and close to the WSM-metal QPT it completely dissolves into the metallic bath of the bulk. Predicted topological nature of the WSM-metal QPT and the resulting bulk-boundary correspondence across this transition can directly be observed in angle-resolved-photo-emmision-spectroscopy (ARPES) and Fourier transformed scanning-tunneling-microscopy (STM) measurements by following the continuous deformation of the Fermi arcs with increasing disorder in recently discovered Weyl materials.

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Robert-Jan Slager, Vladimir Juricic, Bitan Roy. 2017-11-08. Dissolution of topological Fermi arcs in a dirty Weyl semimetal. https://doi.org/10.1103/physrevb.96.201401

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