@article{Schindler:2021:10.1103/physrevb.104.l161106,
author = {Schindler, F and Prem, A},
doi = {10.1103/physrevb.104.l161106},
journal = {Physical Review B},
pages = {1--6},
title = {Dislocation non-Hermitian skin effect},
url = {http://dx.doi.org/10.1103/physrevb.104.l161106},
volume = {104},
year = {2021}
}

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TY  - JOUR
AB  - We demonstrate that crystal defects can act as a probe of intrinsic non-Hermitian topology. In particular, in point-gapped systems with periodic boundary conditions, a pair of dislocations may induce a non-Hermitian skin effect, where an extensive number of Hamiltonian eigenstates localize at only one of the two dislocations. An example of such a phase are two-dimensional systems exhibiting weak non-Hermitian topology, which are adiabatically related to a decoupled stack of Hatano-Nelson chains. Moreover, we show that strong two-dimensional point-gap topology may also result in a dislocation response, even when there is no skin effect present with open boundary conditions. For both cases, we directly relate their bulk topology to a stable dislocation non-Hermitian skin effect. Finally, and in stark contrast to the Hermitian case, we find that gapless non-Hermitian systems hosting bulk exceptional points also give rise to a well-localized dislocation response.
AU  - Schindler,F
AU  - Prem,A
DO  - 10.1103/physrevb.104.l161106
EP  - 6
PY  - 2021///
SN  - 2469-9950
SP  - 1
TI  - Dislocation non-Hermitian skin effect
T2  - Physical Review B
UR  - http://dx.doi.org/10.1103/physrevb.104.l161106
UR  - http://hdl.handle.net/10044/1/105871
VL  - 104
ER  - 

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