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Transport in chemically doped graphene in the presence of adsorbed molecules
Open accessAbstract
Motivated by a recent experiment reporting on the possible application of graphene as sensors, we calculate transport properties of two-dimensional graphene monolayers in the presence of adsorbed molecules. We find that the adsorbed molecules, acting as compensators that partially neutralize the random charged impurity centers in the substrate, enhance the graphene mobility without much change in the carrier density. We predict that subsequent field-effect measurements should preserve this higher mobility for both electrons and holes, but with a voltage induced electron-hole asymmetry that depends on whether the adsorbed molecule was an electron or hole donor in the compensation process. We also calculate the low density magnetoresistance and find good quantitative agreement with experimental results.
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Cites
Two-dimensional gas of massless Dirac fermions in graphene
Novoselov, K. S., Geim, A. K., Morozov, S. V., Jiang, D., Katsnelson, M. I., Grigorieva, I. V., Dubonos, S. V., & Firsov, A. A. (2005) · Nature · doi:10.1038/nature04233 · Cited by 21,611
Cited by
Detection of individual gas molecules adsorbed on graphene
Schedin, F., Geim, A. K., Morozov, S. V., Hill, E. W., Blake, P., Katsnelson, M. I., & Novoselov, K. S. (2007) · Nature Materials · doi:10.1038/nmat1967 · Cited by 8,028
Graphene-based smart materials
Yu, X., Cheng, H., Zhang, M., Zhao, Y., Qu, L., & Shi, G. (2017) · Nature Reviews Materials · doi:10.1038/natrevmats.2017.46 · Cited by 796
Cao, C., Wu, M., Jiang, J., & Cheng, H.-P. (2010) · Physical Review B · doi:10.1103/physrevb.81.205424 · Cited by 262
Metadata
- Authors
- Hwang, E. H., Adam, S., & Das Sarma, S.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2007-11-15
- Volume
- 76
- Issue
- 19
- ISSN
- 1098-0121 (ISSN-L)
- 1550-235X
- OpenAlex
- W1988772373
- Cited by
- 192
- References
- 1
- FWCI
- 8.78
- Type
- journal article
- Language
- en
- Open access
- green
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