Reference : Universal Hall conductance scaling in non-Hermitian Chern insulators
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/49690
Universal Hall conductance scaling in non-Hermitian Chern insulators
English
Groenendijk, Solofo []
Schmidt, Thomas mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Meng, Tobias []
Apr-2021
Physical Review Research
American Physical Society (APS)
Yes
2643-1564
College Park
MD
[en] We investigate the Hall conductance of a two-dimensional Chern insulator coupled to an environment causing gain and loss. Introducing a biorthogonal linear response theory, we show that sufficiently strong gain and loss lead to a characteristic nonanalytical contribution to the Hall conductance. Near its onset, this contribution exhibits a universal power law with a power 3/2 as a function of Dirac mass, chemical potential, and gain strength. Our results pave the way for the study of non-Hermitian topology in fermionic transport experiments.
Fonds National de la Recherche - FnR
http://hdl.handle.net/10993/49690

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