@article{Vecsei:2021:10.1103/physrevb.103.l201114,
author = {Vecsei, PM and Denner, MM and Neupert, T and Schindler, F},
doi = {10.1103/physrevb.103.l201114},
journal = {Physical Review B},
pages = {1--5},
title = {Symmetry indicators for inversion-symmetric non-Hermitian topological band structures},
url = {http://dx.doi.org/10.1103/physrevb.103.l201114},
volume = {103},
year = {2021}
}

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TY  - JOUR
AB  - We characterize non-Hermitian band structures by symmetry indicator topological invariants. Enabled by crystalline inversion symmetry, these indicators allow us to short-cut the calculation of conventional non-Hermitian topological invariants. In particular, we express the three-dimensional winding number of point-gapped non-Hermitian systems, which is defined as an integral over the whole Brillouin zone, in terms of symmetry eigenvalues at high-symmetry momenta. Furthermore, for time-reversal symmetric non-Hermitian topological insulators, we find that symmetry indicators characterize the associated Chern-Simons form, whose evaluation usually requires a computationally expensive choice of smooth gauge. In each case, we discuss the non-Hermitian surface states associated with nontrivial symmetry indicators.
AU  - Vecsei,PM
AU  - Denner,MM
AU  - Neupert,T
AU  - Schindler,F
DO  - 10.1103/physrevb.103.l201114
EP  - 5
PY  - 2021///
SN  - 2469-9950
SP  - 1
TI  - Symmetry indicators for inversion-symmetric non-Hermitian topological band structures
T2  - Physical Review B
UR  - http://dx.doi.org/10.1103/physrevb.103.l201114
UR  - http://hdl.handle.net/10044/1/105872
VL  - 103
ER  - 

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