Spin-dependent electron transport in protein-like single-helical molecules

We report on a theoretical study of spin-dependent electron transport through single-helical molecules connected by two nonmagnetic electrodes, and explain the experiment of significant spin-selective phenomenon observed in α-helical protein and the contradictory results between the protein and sing...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences - PNAS 2014-08, Vol.111 (32), p.11658-11662
Main Authors: Guo, Ai-Min, Sun, Qing-Feng
Format: Article
Language:English
Subjects:
Amino acids
Biological Sciences
Biophysical Phenomena
Deoxyribonucleic acid
DNA
DNA, Single-Stranded - chemistry
Electrodes
Electron transfer
Electron Transport
Electrons
Experiments
Geometric lines
Models, Chemical
Models, Molecular
Molecules
Parametric models
Physical Sciences
Physics
Protein Structure, Secondary
Proteins
Proteins - chemistry
Single stranded DNA
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Summary:We report on a theoretical study of spin-dependent electron transport through single-helical molecules connected by two nonmagnetic electrodes, and explain the experiment of significant spin-selective phenomenon observed in α-helical protein and the contradictory results between the protein and single-stranded DNA. Our results reveal that the α-helical protein is an efficient spin filter and the spin polarization is robust against the disorder. These results are in excellent agreement with recent experiments [Mishra D, et al. (2013) Proc Natl Acad Sci USA 110(37):14872–14876; Göhler B, et al. (2011) Science 331(6019):894–897] and may facilitate engineering of chiral-based spintronic devices.
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.1407716111