Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 111, Issue 32, Pages 11658-11662Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1407716111
Keywords
spintronics; biological molecules; chirality; multiple transport pathways; spin-filtering effect
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Funding
- National Basic Research Program of China [2012CB921303]
- National Natural Science Foundation of China [11274364]
- Postdoctoral Science Foundation of China [2013M540153]
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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 a-helical protein and the contradictory results between the protein and single-stranded DNA. Our results reveal that the a-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): 1487214876; Gohler B, et al. (2011) Science 331(6019): 894-897] and may facilitate engineering of chiral-based spintronic devices.
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