{"abstracts":[{"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"},{"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"}],"refs":[],"contribs":[{"index":0,"raw_name":"P. Baireuther","role":"author"},{"index":1,"raw_name":"J. A. Hutasoit","role":"author"},{"index":2,"raw_name":"J. Tworzydło","role":"author"},{"index":3,"raw_name":"C. W. J. Beenakker","role":"author"}],"license_slug":"ARXIV-1.0","language":"en","version":"v2","ext_ids":{"arxiv":"1512.02144v2"},"release_year":2015,"release_date":"2015-12-10","release_stage":"submitted","release_type":"article","work_id":"awxnv3767rckdaq7ja2oibkryq","title":"Scattering theory of the chiral magnetic effect in a Weyl semimetal:\n Interplay of bulk Weyl cones and surface Fermi arcs","state":"active","ident":"xbrvs2mutnf7lb7xx76hi2k7uy","revision":"8ad7d3c2-3d03-48fc-9828-9a2f6645276e","extra":{"arxiv":{"base_id":"1512.02144","categories":["cond-mat.mes-hall"],"comments":"8 pages, 8 figures; V2: added references with discussion; V3: To be\n published in the Focus Issue on \"Topological semimetals\" of New Journal of\n Physics","journal_ref":"New J. Phys. 18, 045009 (2016)"},"superceded":true}}