Quantum transport in carbon nanotubes covalently functionalized with magnetic molecules. Issue 12 (14th July 2016)

• Record Type: Journal Article
• Authors: Schnee, Michael; Besson, Claire; Frielinghaus, Robert; Lurz, Christian; Kögerler, Paul; Schneider, Claus M.; Meyer, Carola
• Is Part Of: Physica status solidi. Volume 253:Issue 12(2016)
• Page Start: 2424
• Page End: 2427
• Publication Date: 2016-07-14
• Subjects: carbon nanotubes -- magnetic molecules -- molecular electronics -- quantum dots; Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201600292
• Languages: English
• ISSNs: 0370-1972

Abstract

Abstract : We report on quantum transport measurements of a carbon nanotube (CNT) quantum dot that is functionalized with magnetic {Mn4 } complexes. The coupling between the spin‐5/2 Mn II ions within each {Mn4 } complex is predominantly antiferromagnetic. Coulomb diamond measurements at T = 4 K reveal that the covalent attachment of the complexes to the CNT framework has only little influence on the carbon nanotube quantum dot. Surprisingly, a strong increase of noise is observed upon cooling the sample to T = 30 mK. Time traces of the current taken at a diamond edge reveal a random telegraph signal. We attribute this to fluctuations of molecular spin states of the attached {Mn4 } complexes.