102157 20230519145439.0 doi 10.1039/d0nr08558h sideral 124094 ART-2021-124094 eng Hernández López, L. (orcid)0000-0001-9713-5603 Searching for kagome multi-bands and edge states in a predicted organic topological insulator 2021 Access copy available to the general public Unrestricted Recently, mixed honeycomb–kagome lattices featuring metal–organic networks have been theoretically proposed as topological insulator materials capable of hosting nontrivial edge states. This new family of so-called “organic topological insulators” are purely two-dimensional and combine polyaromatic-flat molecules with metal adatoms. However, their experimental validation is still pending given the generalized absence of edge states. Here, we generate one such proposed network on a Cu(111) substrate and study its morphology and electronic structure with the purpose of confirming its topological properties. The structural techniques reveal a practically flawless network that results in a kagome network multi-band observed by angle-resolved photoemission spectroscopy and scanning tunneling spectroscopy. However, at the network island borders we notice the absence of edge states. Bond-resolved imaging of the network exhibits an unexpected structural symmetry alteration that explains such disappearance. This collective lifting of the network symmetry could be more general than initially expected and provide a simple explanation for the recurrent experimental absence of edge states in predicted organic topological insulators. info:eu-repo/grantAgreement/ES/AEI/PID2019-107338RB-C63 info:eu-repo/grantAgreement/ES/AEI/PID2019-107338RB-C64 info:eu-repo/grantAgreement/ES/DGA-FSE/E12-20R info:eu-repo/grantAgreement/EUR/ERDF/EFA194-16TNSI info:eu-repo/grantAgreement/ES/MINECO/MAT2016-78293-C6-4-R info:eu-repo/grantAgreement/ES/MINECO/MAT2016-78293-C6-6R info:eu-repo/grantAgreement/ES/MINECO/MAT2017-83468-R info:eu-repo/semantics/openAccess by-nc http://creativecommons.org/licenses/by-nc/3.0/es/ 8.307 2021 CHEMISTRY, MULTIDISCIPLINARY 37 / 180 = 0.206 2021 Q1 T1 PHYSICS, APPLIED 23 / 161 = 0.143 2021 Q1 T1 MATERIALS SCIENCE, MULTIDISCIPLINARY 70 / 345 = 0.203 2021 Q1 T1 NANOSCIENCE & NANOTECHNOLOGY 31 / 109 = 0.284 2021 Q2 T1 1.744 2021 Nanoscience and Nanotechnology 2021 Q1 Materials Science (miscellaneous) 2021 Q1 13.4 2021 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Piquero-Zulaica, I. Downing, C.A. (orcid)0000-0002-0058-9746 Piantek, M. Fujii, J. Serrate, D. (orcid)0000-0002-3260-9641 Ortega, J.E. Bartolomé, F. (orcid)0000-0002-0047-1772 Lobo Checa, J. (orcid)0000-0003-2698-2543 13, 10 (2021), 5216-5223 Nanoscale Nanoscale 2040-3364 2044273 http://zaguan.unizar.es/record/102157/files/texto_completo.pdf Versión publicada 3003866 http://zaguan.unizar.es/record/102157/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:102157 articulos driver 2023-05-18-14:28:49 ARTICLE