Efficient spin filtering through cobalt-based extended metal atom chains

Georgiev, V. and McGrady, J.E. (2010) Efficient spin filtering through cobalt-based extended metal atom chains. Inorganic Chemistry, 49(12), (doi: 10.1021/ic100493t)

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Abstract

Density functional theory in conjunction with nonequilibrium Green’s functions has been used to explore charge transport through the cobalt-based extended metal atom chain, Co3(dpa)4(NCS)2. The isolated molecule has a doublet ground state, and the singly occupied σ nonbonding orbital proves to be the dominant transport channel, providing spin filtering efficiencies in excess of 90%. The metal chain differs from typical organic conductors in that the π orbitals that form the contact with the gold electrode are orthogonal to the transport channel. As a result, the rehybridization of these π levels by the applied electric field has only a minor impact on the current, allowing spin filtering to persist even at biases in excess of 1 V.

Item Type:Articles
Keywords:DFT, NEGF, electron transport in inorganic molecules
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McGrady, Prof John and Georgiev, Dr Vihar
Authors: Georgiev, V., and McGrady, J.E.
Subjects:Q Science > QD Chemistry
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Chemistry
Journal Name:Inorganic Chemistry
ISSN:0020-1669

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