Spin-Selective Electron Transport Through Single Chiral Molecules.
- Resource Type
- Academic Journal
- Authors
- Safari MR; Peter Grünberg Institute, Electronic Properties (PGI-6), Forschungszentrum Jülich, 52425, Jülich, Germany.; Jülich Aachen Research Alliance (JARA-FIT), Fundamentals of Future Information Technology, Forschungszentrum Jülich, 52425, Jülich, Germany.; Matthes F; Peter Grünberg Institute, Electronic Properties (PGI-6), Forschungszentrum Jülich, 52425, Jülich, Germany.; Jülich Aachen Research Alliance (JARA-FIT), Fundamentals of Future Information Technology, Forschungszentrum Jülich, 52425, Jülich, Germany.; Schneider CM; Peter Grünberg Institute, Electronic Properties (PGI-6), Forschungszentrum Jülich, 52425, Jülich, Germany.; Jülich Aachen Research Alliance (JARA-FIT), Fundamentals of Future Information Technology, Forschungszentrum Jülich, 52425, Jülich, Germany.; Fakultät für Physik, Universität Duisburg-Essen, 47057, Duisburg, Germany.; Ernst KH; Molecular Surface Science Group, Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600, Dübendorf, Switzerland.; Nanosurf Laboratory, Institute of Physics, The Czech Academy of Sciences, 16200, Prague, Czech Republic.; Institut für Chemie, Universität Zürich, 8057, Zürich, Switzerland.; Bürgler DE; Peter Grünberg Institute, Electronic Properties (PGI-6), Forschungszentrum Jülich, 52425, Jülich, Germany.; Jülich Aachen Research Alliance (JARA-FIT), Fundamentals of Future Information Technology, Forschungszentrum Jülich, 52425, Jülich, Germany.
- Source
- Publisher: Wiley-VCH Country of Publication: Germany NLM ID: 101235338 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1613-6829 (Electronic) Linking ISSN: 16136810 NLM ISO Abbreviation: Small Subsets: PubMed not MEDLINE; MEDLINE
- Subject
- Language
- English
The interplay between chirality and magnetism is a source of fascination among scientists for over a century. In recent years, chirality-induced spin selectivity (CISS) has attracted renewed interest. It is observed that electron transport through layers of homochiral molecules leads to a significant spin polarization of several tens of percent. Despite the abundant experimental evidence gathered through mesoscopic transport measurements, the exact mechanism behind CISS remains elusive. This study reports spin-selective electron transport through single helical aromatic hydrocarbons that are sublimed in vacuo onto ferromagnetic cobalt surfaces and examined with spin-polarized scanning tunneling microscopy (SP-STM) at a temperature of 5 K. Direct comparison of two enantiomers under otherwise identical conditions revealed magnetochiral conductance asymmetries of up to 50% when either the molecular handedness is exchanged or the magnetization direction of the STM tip or Co substrate is reversed. Importantly, the results rule out electron-phonon coupling and ensemble effects as primary mechanisms responsible for CISS.
(© 2023 The Authors. Small published by Wiley‐VCH GmbH.)