Related Experiment Video
Updated: Mar 21, 2026
10:36
Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
Published on: January 21, 2016
11.5K
Rhombohedral Multilayer Graphene: A Magneto-Raman Scattering Study
Younes Henni1, Hector Pablo Ojeda Collado2, Karol Nogajewski1
1LNCMI (CNRS, UJF, UPS, INSA), BP 166, 38042 Grenoble, Cedex 9, France.
Nano Letters
|May 11, 2016
Summary
Researchers explored ABC-stacked graphene multilayers, revealing a unique electronic band near the Fermi level. This discovery offers a new method for studying ABC stacking and its potential for novel electronic states.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Graphene multilayers exhibit distinct electronic properties based on stacking order (ABA vs. ABC).
- Experimental investigation of ABC-stacked graphene multilayers remains limited compared to ABA stacking.
- Understanding ABC stacking is crucial for exploring novel electronic behaviors in few-layer graphene.
Purpose of the Study:
- To experimentally investigate the electronic properties of large ABC-stacked graphene multilayer domains.
- To develop a method for identifying and characterizing ABC stacking in graphene flakes.
- To explore the potential of ABC-stacked graphene for hosting strongly correlated electronic states.
Main Methods:
- Magneto-optical spectroscopy was employed to study a graphene multilayer flake with over 17 ABC-stacked layers.
- Electronic Raman scattering was used to fingerprint the ABC stacking configuration.
- Analysis of Landau level excitations under magnetic fields was performed to probe electronic band structures.
Main Results:
- A characteristic electronic Raman scattering response confirmed the presence of ABC stacking at room temperature.
- Magneto-optical measurements provided strong evidence for a dispersionless electronic band near the Fermi level in ABC multilayers.
- The identified band is consistent with theoretical predictions for ABC-stacked graphene.
Conclusions:
- This study presents a simple and effective method for probing ABC stacking in graphene multilayers.
- The observed dispersionless band near the Fermi level in ABC graphene is a key signature of this stacking.
- This highly degenerated band is a promising candidate for hosting exotic strongly correlated electronic states.
More Related Videos
Related Concept Videos
01:20Raman Spectroscopy: Overview
2.3K
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
2.3K
01:26Raman Spectroscopy Instrumentation: Overview
1.6K
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
1.6K