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- W4380568591 abstract "Abstract Nodal-line semimetals are topological phases where the conduction and the valence bands cross each other along one-dimensional lines in the Brillouin zone, which are symmetry protected by either spatial symmetries or time-reversal symmetry. In particular, nodal lines protected by the combined <?CDATA $mathcal{PT}$ ?> symmetry exhibits the parity anomaly of 2D Dirac fermions. In this letter, we study the electrochemical transport in <?CDATA $mathcal{PT}text{-symmetric}$ ?> Dirac nodal-line semimetals by using the semiclassical Boltzmann equation approach. We derive a general formula for the topological current that includes both the Berry curvature and the orbital magnetic moment. We first evaluate the electrochemical current by introducing a small <?CDATA $mathcal{PT}text{-breaking}$ ?> mass term (which could be induced by inversion-breaking uniaxial strain, pressure, or an external electric field) and apply it to the hexagonal pnictide CaAgP. The electrochemical current vanishes in the zero-mass limit. Introducing a tilting term that does not spoil <?CDATA $mathcal{PT}$ ?> symmetry that protects the nodal ring, we obtain a finite electrochemical current in the zero-mass limit, which can be regarded as a direct consequence of the parity anomaly. We show that the parity-anomaly–induced electrochemical transport is also present at nonzero temperatures." @default.
- W4380568591 created "2023-06-15" @default.
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- W4380568591 date "2023-06-28" @default.
- W4380568591 modified "2023-10-01" @default.
- W4380568591 title "Electrochemical transport in Dirac nodal-line semimetals" @default.
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- W4380568591 doi "https://doi.org/10.1209/0295-5075/acde5e" @default.
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