@article{WOS:000661529700002,
 abstract = {We present a complete topological characterization of a bilayer
composite of two Chern insulators (specifically, Haldane models) and
explicitly establish the bulk-boundary correspondences. We show that an
appropriately defined Chern number accurately maps out all the possible
phases of the system and remains well defined even in the presence of
degeneracies in the occupied bands. Importantly, our result paves the
way for realizing adiabatic preparation of monolayer Chern insulators.
This has been a major challenge to date, given the impossibility of
unitarily connecting inequivalent topological phases. We show that this
difficulty can be circumvented by adiabatically varying the interlayer
coupling in such a way that the system remains gapped at all times. In
particular, complete knowledge of the phase diagram of the bilayer
composite immediately allows one to identify all such adiabatic passages
which may connect the different Chern inequivalent phases of the
individual monolayers.},
 article-number = {224304},
 author = {Bhattacharjee, Sourav and Bandyopadhyay, Souvik and Sen, Diptiman and
Dutta, Amit},
 doi = {10.1103/PhysRevB.103.224304},
 eissn = {2469-9969},
 issn = {2469-9950},
 journal = {PHYSICAL REVIEW B},
 month = {JUN 14},
 number = {22},
 orcid-numbers = {Bhattacharjee, Sourav/0000-0003-3798-6400
Bandyopadhyay, Souvik/0000-0002-4669-5536},
 title = {Bilayer Haldane system: Topological characterization and adiabatic
passages connecting Chern phases},
 unique-id = {WOS:000661529700002},
 volume = {103},
 year = {2021}
}