Electric Field Effect Tuning of Electron-Phonon Coupling in Graphene

Jun Yan; Yuanbo Zhang; Philip Kim; A. Pinczuk

doi:10.1103/physrevlett.98.166802

Abstract

Gate-modulated low-temperature Raman spectra reveal that the electric field effect (EFE), pervasive in contemporary electronics, has marked impacts on long-wavelength optical phonons of graphene. The EFE in this two-dimensional honeycomb lattice of carbon atoms creates large density modulations of carriers with linear dispersion (known as Dirac fermions). Our EFE Raman spectra display the interactions of lattice vibrations with these unusual carriers. The changes of phonon frequency and linewidth demonstrate optically the particle-hole symmetry about the charge-neutral Dirac point. The linear dependence of the phonon frequency on the EFE-modulated Fermi energy is explained as the electron-phonon coupling of massless Dirac fermions.

Keywords

GrapheneCondensed matter physicsPhononDirac fermionPhysicsRaman spectroscopyFermi energyElectric fieldElectronQuantum mechanics

Affiliated Institutions

Columbia University US

Related Publications

Two- and One-Dimensional Honeycomb Structures of Silicon and Germanium

Seymur Cahangirov , Mehmet Topsakal , Ethem Aktürk +2 more

First-principles calculations of structure optimization, phonon modes, and finite temperature molecular dynamics predict that silicon and germanium can have stable, two-dimensio...

2009 Physical Review Letters 3257 citations

Charge Density Wave, Superconductivity, and Anomalous Metallic Behavior in 2D Transition Metal Dichalcogenides

A. H. Castro Neto

We propose a theory for quasi-two-dimensional transition metal dichalcogenides that provides a unified microscopic picture of the charge density wave (CDW) and superconducting p...

2001 Physical Review Letters 475 citations

Quantum Transport of Massless Dirac Fermions

Kentaro Nomura , A. H. MacDonald

Motivated by recent graphene transport experiments, we undertake a numerical study of the conductivity of disordered two-dimensional massless Dirac fermions. Our results reveal ...

2007 Physical Review Letters 648 citations

Electron Transport and Hot Phonons in Carbon Nanotubes

Michele Lazzeri , S. Piscanec , Francesco Mauri +2 more

We demonstrate the key role of phonon occupation in limiting the high-field ballistic transport in metallic carbon nanotubes. In particular, we provide a simple analytic formula...

2005 Physical Review Letters 270 citations

<i>Ab initio</i>calculation of the low-frequency Raman cross section in silicon

Stefano Baroni , Raffaele Resta

The macroscopic polarizability of silicon is calculated from first principles as a function of the lattice distortion induced by a zone-center optical phonon. The electronic res...

1986 Physical review. B, Condensed matter 69 citations

Publication Info

Year: 2007
Type: article
Volume: 98
Issue: 16
Pages: 166802-166802
Citations: 1116
Access: Closed

External Links

View on DOI.org

Social Impact

Altmetric

Electric Field Effect Tuning of Electron-Phonon Coupling in Graphene

PlumX Metrics

Social media, news, blog, policy document mentions

Citation Metrics

1116

OpenAlex

Cite This

APA Style

                            
                                
                                    Jun Yan, 
                                
                                    Yuanbo Zhang, 
                                
                                    Philip Kim
                                
                                et al.
                            
                            (2007). 
                            Electric Field Effect Tuning of Electron-Phonon Coupling in Graphene. 
                            Physical Review Letters
                            , 98
                            (16)
                            , 166802-166802.
                            https://doi.org/10.1103/physrevlett.98.166802
                        

Identifiers

DOI: 10.1103/physrevlett.98.166802