Hostname: page-component-586b7cd67f-g8jcs Total loading time: 0 Render date: 2024-11-24T09:25:54.407Z Has data issue: false hasContentIssue false
  • English
  • Français

Validity of the Free Electron Model for Two-Dimensional Electrodes

Published online by Cambridge University Press:  12 February 2015

Kenji Kondo
Kenji Kondo*
Affiliation:
Laboratory of Nanostructure Physics, Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0020, Japan.
Get access

Abstract

Generally, the electrodes are regarded as free electron gases when we calculate the transport characteristics of nanostructure materials or devices. In three dimensional electrodes, there are little electron correlation. However, in low-dimensional electrodes, electron correlation becomes much larger than that in three dimensional ones. Recently, nanotechnology has made much progress to fabricate two-dimensional (2D) electrodes easily and precisely. As a result, we must consider whether two-dimensional electrodes can be regarded as free electron gases. In this study, we investigate the electron energy spectrum of 2D electrodes, taking into consideration the electron correlation. These results suggest that the free electron model is justified only at the Fermi momentum and that we should not regard 2D electrodes as free electron gases without careful consideration under high electric field and/or high temperature.

Keywords

electronic structuresimulationnanoscale
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1753: Symposium NN – Mathematical and Computational Aspects of Materials Science , 2015 , mrsf14-1753-nn08-03
Copyright
Copyright © Materials Research Society 2015 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Kondo, K., Kaiju, H., and Ishibashi, A., J. Appl. Phys. 105, 07D522 (2009).CrossRefGoogle Scholar
Sato, K., Dutta, M., and Fukata, N., Nanoscale 6, 6092 (2014).CrossRefGoogle Scholar
Hedin, L., Phys. Rev. 139, A796 (1965).CrossRefGoogle Scholar
Hybertsen, M. S. and Louie, S. G., Phys. Rev. B 34, 5390 (1986).CrossRefGoogle Scholar
Holm, B., Phys. Rev. Lett. 83, 788 (1999).CrossRefGoogle Scholar
Takada, Y., Phys. Rev. Lett. 87, 226402 (2001).CrossRefGoogle Scholar
Ivchenko, E.L. and Pikus, G.E., Superlattices and Other Heterostructures (Springer), p.81 (1997).CrossRefGoogle Scholar
Hedin, L. and Lundqvist, S., Solid State Phys. 23, 1 (1969).Google Scholar
Arora, V., Jpn. J. Appl. Phys. 24, 537 (1985).CrossRefGoogle Scholar