CaltechAUTHORS
Published December 10, 2008 | Version Published
Journal Article Open

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

Creators

  • 1. ROR icon University of Hong Kong
  • 2. ROR icon Hong Kong University of Science and Technology
  • 3. ROR icon California Institute of Technology

Abstract

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.

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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Additional details

Identifiers

Eprint ID
12422
Resolver ID
CaltechAUTHORS:YAMnano08

Funding

Intel Corp.
Hong Kong Research Grant Council
HKU 7011/06P
Hong Kong Research Grant Council
N_HKU 764/05
Hong Kong Research Grant Council
HKUST 2/04C

Dates

Created
2008-11-25
Created from EPrint's datestamp field
Updated
2022-07-12
Created from EPrint's last_modified field

Caltech Custom Metadata

Other Numbering System Name
WAG
Other Numbering System Identifier
0779