Scattering theory of the chiral magnetic effect in a Weyl semimetal: Interplay of bulk Weyl cones and surface Fermi arcs release_xbrvs2mutnf7lb7xx76hi2k7uy

by P. Baireuther, J. A. Hutasoit, J. Tworzydło, C. W. J. Beenakker

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abstracts [{'sha1': '3a27def2ae7933d1d32465fd85e69fde99a3f297', 'content': 'We formulate a linear response theory of the chiral magnetic effect in a\nfinite Weyl semimetal, expressing the electrical current density j induced by\na slowly oscillating magnetic field B or chiral chemical potential μ in\nterms of the scattering matrix of Weyl fermions at the Fermi level. Surface\nconduction can be neglected in the infinite-system limit for δ j/δμ, but not for δ j/δ B: The chirally circulating surface Fermi\narcs give a comparable contribution to the bulk Weyl cones no matter how large\nthe system is, because their smaller number is compensated by an increased flux\nsensitivity. The Fermi arc contribution to μ^-1δ j/δ B has the\nuniversal value (e/h)^2, protected by chirality against impurity scattering\n--- unlike the bulk contribution of opposite sign.', 'mimetype': 'text/plain', 'lang': 'en'}, {'sha1': '11924886cd0f5ee2593b3e67f1ee584a4bc1ce84', 'content': 'We formulate a linear response theory of the chiral magnetic effect in a\nfinite Weyl semimetal, expressing the electrical current density $j$ induced by\na slowly oscillating magnetic field $B$ or chiral chemical potential $\\mu$ in\nterms of the scattering matrix of Weyl fermions at the Fermi level. Surface\nconduction can be neglected in the infinite-system limit for $\\delta j/\\delta\n\\mu$, but not for $\\delta j/\\delta B$: The chirally circulating surface Fermi\narcs give a comparable contribution to the bulk Weyl cones no matter how large\nthe system is, because their smaller number is compensated by an increased flux\nsensitivity. The Fermi arc contribution to $\\mu^{-1}\\delta j/\\delta B$ has the\nuniversal value $(e/h)^2$, protected by chirality against impurity scattering\n--- unlike the bulk contribution of opposite sign.', 'mimetype': 'application/x-latex', 'lang': 'en'}]
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release_date 2015-12-10
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release_year 2015
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title Scattering theory of the chiral magnetic effect in a Weyl semimetal: Interplay of bulk Weyl cones and surface Fermi arcs
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arxiv.base_id 1512.02144
arxiv.categories ['cond-mat.mes-hall']
arxiv.comments 8 pages, 8 figures; V2: added references with discussion; V3: To be published in the Focus Issue on "Topological semimetals" of New Journal of Physics
arxiv.journal_ref New J. Phys. 18, 045009 (2016)
superceded True