Controlling the Spin Texture of Topological Insulators by Rational Design of Organic Molecules

Autor:	Martin Aeschlimann, Mario Ruben, Benjamin Stadtmüller, Awadhesh Narayan, Oliver L.A. Monti, Yew San Hor, Ivan Rungger, Johannes Stöckl, Andrea Droghetti, Stefano Sanvito, S. Jakobs, Robert J. Cava, Mirko Cinchetti, Stefan Mathias, Martin Laux, Dominik Jungkenn, Svetlana Klyatskaya
Rok vydání:	2015
Předmět:	Surface (mathematics) Materials science Spintronics Texture (cosmology) Mechanical Engineering Rational design Bioengineering Nanotechnology General Chemistry Condensed Matter Physics Chemical physics Topological insulator Molecule General Materials Science Surface states Spin-½
Zdroj:	Nano Letters. 15:6022-6029
ISSN:	1530-6992 1530-6984
DOI:	10.1021/acs.nanolett.5b02213
Popis:	We present a rational design approach to customize the spin texture of surface states of a topological insulator. This approach relies on the extreme multifunctionality of organic molecules that are used to functionalize the surface of the prototypical topological insulator (TI) Bi2Se3. For the rational design we use theoretical calculations to guide the choice and chemical synthesis of appropriate molecules that customize the spin texture of Bi2Se3. The theoretical predictions are then verified in angular-resolved photoemission experiments. We show that, by tuning the strength of molecule-TI interaction, the surface of the TI can be passivated, the Dirac point can energetically be shifted at will, and Rashba-split quantum-well interface states can be created. These tailored interface properties-passivation, spin-texture tuning, and creation of hybrid interface states-lay a solid foundation for interface-assisted molecular spintronics in spin-textured materials.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::85c5892fbd266d6fe96c711dcf022209 https://doi.org/10.1021/acs.nanolett.5b02213 Zobrazit plný text záznamu