Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/99075
Title: Switching, dual spin-filtering effects, and negative differential resistance in a carbon-based molecular device
Authors: Sun, Changqing
Zhou, Guanghui
Wan, Haiqing
Zhou, Benhu
Chen, Xiongwen
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2011
Source: Wan, H., Zhou, B., Chen, X., Sun, C., & Zhou, G. (2012). Switching, dual spin-filtering effects, and negative differential resistance in a carbon-based molecular device. The journal of physical chemistry C, 116(3), 2570-2574.
Series/Report no.: The journal of physical chemistry C
Abstract: We present ab initio calculations for spin-dependent electron transport in a molecular device constructed by two carbon chains capped with a phenyl ring, which is sandwiched between two zig-zag-edged graphene nanoribbon (ZGNR) electrodes, where the ZGNRs are modulated by external magnetic field. The coexistence of switching, dual spin-filtering effects, and negative differential resistance (NDR) in the model device is demonstrated with the theory of carbon π-electrons. Interestingly, a two-state molecular conformational switch can be realized by changing the orientation between the planes of phenyl ring and electrodes, where the majority-spin current modulation (ON/OFF ratio) is 170–479 within the considered bias window. Moreover, the device shows perfect dual spin-filtering effect and can generate and control a full dual spin-polarized current through either the source-drain voltage or magnetic configuration of the electrodes. The selective spin current is due to a dual selection rule, the symmetry match between two ZGNR electrodes spin channel, and the carbon chain’s spin selection in our system. In addition, the obvious NDR behavior has also been observed in our model.
URI: https://hdl.handle.net/10356/99075
http://hdl.handle.net/10220/17240
DOI: 10.1021/jp2092576
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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