# Optical transparency of graphene as determined by the fine-structure constant

@article{Sheehy2009OpticalTO, title={Optical transparency of graphene as determined by the fine-structure constant}, author={Daniel E. Sheehy and Joerg Schmalian}, journal={Physical Review B}, year={2009}, volume={80}, pages={193411} }

The observed 97.7% optical transparency of graphene has been linked to the value 1/137 of the fine structure constant, by using results for noninteracting Dirac fermions. The agreement in three significant figures requires an explanation for the apparent unimportance of the Coulomb interaction. Using arguments based on Ward identities, the leading corrections to the optical conductivity due to the Coulomb interactions are correctly computed (resolving a theoretical dispute) and shown to amount…

## 121 Citations

### Universality of Conductivity in Interacting Graphene

- Physics
- 2012

The Hubbard model on the honeycomb lattice describes charge carriers in graphene with short range interactions. While the interaction modifies several physical quantities, like the value of the Fermi…

### Universality of Conductivity in Interacting Graphene

- PhysicsCommunications in Mathematical Physics
- 2012

The Hubbard model on the honeycomb lattice describes charge carriers in graphene with short range interactions. While the interaction modifies several physical quantities, like the value of the Fermi…

### Communications in Mathematical Physics Universality of Conductivity in Interacting Graphene

- Physics
- 2012

The Hubbard model on the honeycomb lattice describes charge carriers in graphene with short range interactions. While the interaction modifies several physical quantities, like the value of the Fermi…

### On the universal ac optical background in graphene

- Physics
- 2009

Latest experiments have confirmed the theoretically expected universal value πe2/2h of the ac conductivity of graphene and have revealed departures of the quasi-particle dynamics from predictions for…

### Drude weight, plasmon dispersion, and a.c. conductivity in doped graphene sheets

- Physics
- 2011

We demonstrate that the plasmon frequency and Drude weight of the electron liquid in a doped graphene sheet are strongly renormalized by electron-electron interactions even in the long-wavelength…

### Optical conductivity in graphene: Hydrodynamic regime

- PhysicsPhysical Review B
- 2019

A recent measurement of the optical conductivity in graphene [Gallagher, Yang, Lyu, Tian, Kou, Zhang, Watanabe, Taniguchi, and Wang, Science 364, 158 (2019)] offers a possibility of experimental…

### Field theoretic renormalization study of interaction corrections to the universal ac conductivity of graphene

- PhysicsJournal of High Energy Physics
- 2018

A bstractThe two-loop interaction correction coefficient to the universal ac conductivity of disorder-free intrinsic graphene is computed with the help of a field theoretic renormalization study…

### 1 Electronic Transport and Optical Properties of Graphene

- Physics
- 2014

The enormous list of publications on transport measurements in graphene starts with the seminal papers by the groups from Manchester and Columbia [1a]. Already these studies indicated a very robust…

### Interaction corrections to the minimal conductivity of graphene via dimensional regularization

- Physics
- 2014

We compute the two-loop interaction correction to the minimal conductivity of disorder-free intrinsic graphene with the help of dimensional regularization. The calculation is done in two different…

### Absence of dynamical gap generation in suspended graphene

- Physics
- 2012

There is an interesting proposal that the long-range Coulomb interaction in suspended graphene can generate a dynamical gap, which leads to a semimetal–insulator phase transition. We revisit this…