Topological piezoelectric effect and parity anomaly in nodal line semimetals
Topological piezoelectric effect and parity anomaly in nodal line semimetals
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DOI：
10.1103/physrevresearch.2.043311
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发表时间：
2020-12-03
影响因子：
4.2
通讯作者：
Schnyder, Andreas P.
中科院分区：
文献类型：
--
作者：
Matsushita, Taiki;Fujimoto, Satoshi;Schnyder, Andreas P.
Lattice deformations act on the low-energy excitations of Dirac materials as effective axial vector fields. This allows one to directly detect quantum anomalies of Dirac materials via the response to axial gauge fields. We investigate the parity anomaly in Dirac nodal line semimetals induced by lattice vibrations and establish a topological piezoelectric effect; that is, periodic lattice deformations generate topological Hall currents that are transverse to the deformation field. The currents induced by this piezoelectric effect are dissipationless and their magnitude is completely determined by the length of the nodal ring, leading to a semiquantized transport coefficient. Our theoretical proposal can be experimentally realized in various nodal line semimetals, such as CaAgP and Ca3P2.
