Transport in chemically doped graphene in the presence of adsorbed molecules

By Euyheon Hwang, S. Adam. 2006

164 citations recorded by the source corpus.

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.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/a1f783f816570ba7524a17ab310440f617b4aa6b

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atomic and Molecular Physics, and Optics

1. E. Rossi
2. E. Hwang
3. S. Adam
4. N. M. R. Peres
5. Tomás Palacios
6. Jing Kong
7. K. Novoselov
8. Francisco Guinea

In Electrical and Electronic Engineering

1. E. Hwang
2. E. Rossi
3. N. M. R. Peres
4. S. Adam
5. Tomás Palacios

In Materials Chemistry

1. E. Rossi
2. E. Hwang
3. S. Adam
4. N. M. R. Peres
5. Tomás Palacios
6. Jing Kong
7. T. Echtermeyer
8. K. Novoselov

Citations in the corpus

• Colloquium: The transport properties of graphene: An introduction (2010, result): “(50) is an extension, taking screening into account, of previous results (González et al., 1996; Hwang et al., 2007; Polini et al., 2007)].”
• Electronic transport in two-dimensional graphene (2010, methodology): “The break-up of the density landscape in electron-hole puddles as predicted in (Adam et al., 2007; Hwang et al., 2007a) and shown by the DFTLDA (Polini et al., 2008b) and TFD theory (Rossi and Das Sarma, 2008) is clearly visible.”
• Graphene-Based Ambipolar RF Mixers (2010, background): “2(a) may be attributed to chemical doping by adsorbants during processing and handling of the sample [15].”
• A Graphene Field-Effect Device (2007, background): “Raman spectroscopy of the FED (not shown) has identified the presence of a single graphene layer, as it exhibits the characteristic trait of monolayer graphene first published in [9].”