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Dynamic admittance of carbon nanotube-based molecular electronic devices and their equivalent electric circuit

Yam, ChiYung and Mo, Yan and Wang, Fan and Li, Xiaobao and Chen, GuanHua and Zheng, Xiao and Matsuda, Yuki and Tahir-Kheli, Jamil and Goddard, William A., III (2008) Dynamic admittance of carbon nanotube-based molecular electronic devices and their equivalent electric circuit. Nanotechnology, 19 (49). Art. No. 495203. ISSN 0957-4484. doi:10.1088/0957-4484/19/49/495203.

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We use first-principles quantum mechanics to simulate the transient electrical response through carbon nanotube-based conductors under time-dependent bias voltages. The dynamic admittance and time-dependent charge distribution are reported and analyzed. We find that the electrical response of these two-terminal molecular devices can be mapped onto an equivalent classical electric circuit and that the switching time of these end-on carbon nanotube devices is only a few femtoseconds. This result is confirmed by studying the electric response of a simple two-site model device and is thus generalized to other two-terminal molecular electronic devices.

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Goddard, William A., III0000-0003-0097-5716
Additional Information:Copyright © 2008 Institute of Physics. Received 18 July 2008, in final form 15 October 2008. Published 18 November 2008. Print publication: Issue 49 (10 December 2008). The authors thank Hong Guo, Jian Wang, and YiJing Yan for stimulating discussions. The Caltech team was supported partly by Intel Components Research (Portland, OR) and by NSF (CCF-0524490). The HKU team was supported by the Hong Kong Research Grant Council (HKU 7011/06P, N_HKU 764/05, HKUST 2/04C).
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Hong Kong Research Grant CouncilHKU 7011/06P
Hong Kong Research Grant CouncilN_HKU 764/05
Hong Kong Research Grant CouncilHKUST 2/04C
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Issue or Number:49
Record Number:CaltechAUTHORS:YAMnano08
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:12422
Deposited By: Archive Administrator
Deposited On:25 Nov 2008 18:38
Last Modified:12 Jul 2022 19:43

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