Jang, Min Seok and Kim, Hyungjun and Atwater, Harry A. and Goddard, William A., III
(2010)
Time dependent behavior of a localized electron at a heterojunction boundary of graphene.
Applied Physics Letters, 97
(4).
Art. No. 043504.
ISSN 0003-6951.
doi:10.1063/1.3454909.
https://resolver.caltech.edu/CaltechAUTHORS:20100907-141554023
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Abstract
We develop a finite-difference time-domain (FDTD) method for simulating the dynamics of graphene electrons, denoted GraFDTD. We then use GraFDTD to study the temporal behavior of a single localized electron wave packet, showing that it exhibits optical-like dynamics including the Goos–Hänchen effect [ F. Goos and H. Hänchen, Ann. Phys. 436, 333 (1947)] at a heterojunction, but the behavior is quantitatively different than for electromagnetic waves. This suggests issues that must be addressed in designing graphene-based electronic devices analogous to optical devices. GraFDTD should be useful for studying such complex time-dependent behavior of a quasiparticle in graphene.
| Item Type: | Article |
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| Additional Information: | © 2010 American Institute of Physics.
Received 11 February 2010; accepted 25 May 2010; published online 29 July 2010.
This work was supported by DOE LMI EFRC under
Grant No. DE-SC0001293 (M.S.J. and H.A.A.) and the
Functional Engineered Nano Architectronics (FENA) via the
Microelectronics Advanced Research Corporation
(MARCO) with the prime award (2009–NT-2048) at UCLA
(PI Kang Wang). H.J. and W.A.G. also acknowledge support
from the WCU programs through NRF of Korea funded by
the MEST (Grant No. R31-2008-000-10055-0). Two of the
authors (M.S.J. and H.K.) contributed equally to this work. |
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| Funders: | | Funding Agency | Grant Number |
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| Department of Energy (DOE) | DE-SC0001293 | | Microelectronics Advanced Research Corporation (MARCO) | 2009-NT-2048 | | Ministry of Education, Science and Technology (Korea) | R31-2008-000-10055-0 |
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| Subject Keywords: | finite difference time-domain analysis; graphene; localised states; p-n junctions |
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| Other Numbering System: | | Other Numbering System Name | Other Numbering System ID |
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| WAG | 0872 |
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| Issue or Number: | 4 |
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| DOI: | 10.1063/1.3454909 |
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| Record Number: | CaltechAUTHORS:20100907-141554023 |
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| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20100907-141554023 |
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| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. |
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| ID Code: | 19807 |
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| Collection: | CaltechAUTHORS |
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| Deposited By: |
Tony Diaz
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| Deposited On: | 15 Sep 2010 21:26 |
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| Last Modified: | 08 Nov 2021 23:55 |
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