General aspects of the anomaly-related magneto-conductance in Weyl semimetals
ORAL
Abstract
Magneto-conductance (MC) in Weyl semimetals is intensively studied as it is presumably related to the chiral magnetic effect. While the theory of anomaly contribution is widely accepted, its relation to the experimentally-observed MC remains controversial, because there are many other mechanisms for MC. For this purpose, the understanding on the general property of the MC is favorable, e.g., the effects of tilting, warping, and other details. However, studies on such effects are still limited, and no general understanding is reached so far. One challenge here is the lack of general and concise formalism, which is convenient for intuitive discussions.
In this work, we discuss the general behavior of anomaly-related MC by introducing a concise formalism. Using this formalism, we explicitly show that the MC in type-II Weyl semimetals is dominated by the electrons around the Weyl nodes [1]. We also show an intuitive explanation of the tilting dependence of the MC [1]. Our formalism also implies that the MC in type-I Weyl semimetals remains robust even when multiple Weyl nodes are enclosed in a Fermi surface [2].
[1] H. Ishizuka and N. Nagaosa, preprint (arXiv:1807.08147).
[2] H. Ishizuka and N. Nagaosa, preprint (arXiv:1808.09093).
In this work, we discuss the general behavior of anomaly-related MC by introducing a concise formalism. Using this formalism, we explicitly show that the MC in type-II Weyl semimetals is dominated by the electrons around the Weyl nodes [1]. We also show an intuitive explanation of the tilting dependence of the MC [1]. Our formalism also implies that the MC in type-I Weyl semimetals remains robust even when multiple Weyl nodes are enclosed in a Fermi surface [2].
[1] H. Ishizuka and N. Nagaosa, preprint (arXiv:1807.08147).
[2] H. Ishizuka and N. Nagaosa, preprint (arXiv:1808.09093).
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Presenters
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Hiroaki Ishizuka
Department of Applied Physics, University of Tokyo, University of Tokyo
Authors
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Hiroaki Ishizuka
Department of Applied Physics, University of Tokyo, University of Tokyo
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Naoto Nagaosa
University of Tokyo, Riken CEMS, Department of Applied Physics, University of Tokyo, RIKEN Center for Emergent Matter Science (CEMS), RIKEN CEMS, Center for Emergent Matter Science, RIKEN, RIKEN, Department of applied physics, The University of Tokyo, Department of Applied Physics, Universtiy of Tokyo, University of Tokyo