title: Toward Tailored All-Spin Molecular Devices.
abstract: Molecular based spintronic devices offer great potential for future energy-efficient information technology as they combine ultimately small size, high-speed operation, and low-power consumption. Recent developments in combining atom-by-atom assembly with spin-sensitive imaging and characterization at the atomic level have led to a first prototype of an all-spin atomic-scale logic device, but the very low working temperature limits its application. Here, we show that a more stable spintronic device could be achieved using tailored Co-Salophene based molecular building blocks, combined with in situ electrospray deposition under ultrahigh vacuum conditions as well as control of the surface-confined molecular assembly at the nanometer scale. In particular, we describe the tools to build a molecular, strongly bonded device structure from paramagnetic molecular building blocks including spin-wires, gates, and tails. Such molecular device concepts offer the advantage of inherent parallel fabrication based on molecular self-assembly as well as an order of magnitude higher operation temperatures due to enhanced energy scales of covalent through-bond linkage of basic molecular units compared to substrate-mediated coupling schemes employing indirect exchange coupling between individual adsorbed magnetic atoms on surfaces.
authors.affiliation: Department of Physics, University of Hamburg , Jungiusstrasse 11, D-20355 Hamburg, Germany.|Institute of Physics, Poznan University of Technology , Piotrowo 3, 60-965 Poznan, Poland.
authors.forename: Maciej
authors.initials: M
authors.lastname: Bazarnik
authors.affiliation: Department of Chemistry, University of Hamburg , Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany.
authors.forename: Bernhard
authors.initials: B
authors.lastname: Bugenhagen
authors.affiliation: Department of Physics, University of Hamburg , Jungiusstrasse 11, D-20355 Hamburg, Germany.
authors.forename: Micha
authors.initials: M
authors.lastname: Elsebach
authors.affiliation: Institute of Physics, Poznan University of Technology , Piotrowo 3, 60-965 Poznan, Poland.
authors.forename: Emil
authors.initials: E
authors.lastname: Sierda
authors.affiliation: Department of Chemistry, University of Hamburg , Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany.
authors.forename: Annika
authors.initials: A
authors.lastname: Frank
authors.affiliation: Department of Chemistry, Technical University of Kaiserslautern , Erwin-Schrödinger-Str. 52, D-67663 Kaiserslautern, Germany.
authors.forename: Marc H
authors.initials: MH
authors.lastname: Prosenc
authors.affiliation: Department of Physics, University of Hamburg , Jungiusstrasse 11, D-20355 Hamburg, Germany.
authors.forename: Roland
authors.initials: R
authors.lastname: Wiesendanger
keywords: Ullmann coupling; electrospray deposition; molecular self-assembly; salene-complex; scanning tunneling microscopy; spintronic