@article{10902/34975,
year = {2020},
month = {5},
url = {https://hdl.handle.net/10902/34975},
abstract = {Controlling interfacial interactions in magnetic/topological insulator heterostructures is a major challenge for the emergence of novel spin-dependent electronic phenomena. As for any rational design of heterostructures that rely on proximity effects, one should ideally
retain the overall properties of each component while tuning interactions at the interface. However, in most inorganic interfaces interactions are too strong, consequently perturbing, and even quenching, both the magnetic moment and the topological surface states at each side of the interface. Here we show that these properties can be preserved by using ligand chemistry to tune the interaction of magnetic ions with the surface states. By depositing Co-based porphyrin and phthalocyanine monolayers on the surface of Bi₂Se₃ thin films, robust interfaces are formed that preserve undoped topological surface states as well as the
pristine magnetic moment of the divalent Co ions. The selected ligands allow us to tune the interfacial hybridization within this weak interaction regime. These results, which are in stark contrast with the observed suppression of the surface state at the first quintuple layer of Bi₂Se₃ induced by the interaction with Co phthalocyanines, demonstrate the capability of planar metal-organic molecules to span interactions from the strong to the weak limit.},
organization = {This research was funded by the CERCA Program/Generalitat de Catalunya, and supported by the Spanish Ministry of Economy and Competitiveness, MINECO (under Contracts No. MAT2016-78293-C6-2-R, MAT2016-
75952-R, RTI2018-095622-B-I00, and Severo Ochoa No. SEV-2017-0706), the Secretariat for Universities and Research, Knowledge Department of the Generalitat de Catalunya 2017 SGR 827, the European Regional Development Fund (ERDF) under the program Interreg VA España-Francia-Andorra (Contract No. EFA 194/16 TNSI), the European Commission under the H2020 FET Open project Mechanics with Molecules (MEMO) (grant 766864), and the European Research Council under Grant Agreement No. 306652 SPINBOUND.},
publisher = {American Chemical Society},
publisher = {ACS Nano, 2020, 14(5), 6285-6294},
title = {Molecular approach for engineering interfacial interactions in magnetic/topological insulator heterostructures},
author = {González Cuxart, Marc and Valbuena, Miguel Ángel and Robles, Roberto and Moreno Sierra, César and Bonell, Frédéric and Sauthier, Guillaume and Imaz, Inhar and Xu, Heng and Nistor, Corneliu and Barla, Alessandro and Gargiani, Pierluigi and Valvidares, Manuel and Maspoch Comamala, Daniel and Gambardella, Pietro and Valenzuela, Sergio O. and Mugarza, Aitor},
}