[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.
Disciplines :
Physique
Auteur, co-auteur :
Groenendijk, Solofo
SCHMIDT, Thomas ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
Meng, Tobias
Co-auteurs externes :
yes
Langue du document :
Anglais
Titre :
Universal Hall conductance scaling in non-Hermitian Chern insulators
Date de publication/diffusion :
avril 2021
Titre du périodique :
Physical Review Research
eISSN :
2643-1564
Maison d'édition :
American Physical Society (APS), College Park, Etats-Unis - Maryland
