Raman Spectroscopy Study of Rotated Double-Layer Graphene: Misorientation-Angle Dependence of Electronic Structure
University of California, Berkeley · Lawrence Berkeley National Laboratory · +1 more institution
Abstract
We present a systematic Raman study of unconventionally stacked double-layer graphene, and find that the spectrum strongly depends on the relative rotation angle between layers. Rotation-dependent trends in the position, width and intensity of graphene 2D and G peaks are experimentally established and accounted for theoretically. Our theoretical analysis reveals that changes in electronic band structure due to the interlayer interaction, such as rotational-angle dependent Van Hove singularities, are responsible for the observed spectral features. Our combined experimental and theoretical study provides a deeper understanding of the electronic band structure of rotated double-layer graphene, and leads to a…
Citation impact
- FWCI
- 24.31
- Percentile
- 100%
- References
- 38
Authors
10- KKKwanpyo KimCorresponding
University of California, Berkeley, Lawrence Berkeley National Laboratory
- SCSinisa Coh
University of California, Berkeley, Lawrence Berkeley National Laboratory
- LZLiang Z. Tan
University of California, Berkeley, Lawrence Berkeley National Laboratory
- WRWilliam Regan
University of California, Berkeley, Lawrence Berkeley National Laboratory
- JMJong Min Yuk
Lawrence Berkeley National Laboratory, University of California, Berkeley, Korea Advanced Institute of Science and Technology
Topics & keywords
- Graphene
- Raman spectroscopy
- Misorientation
- Materials science
- Rotation (mathematics)
- Electronic structure
- Condensed matter physics
- G band