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Related Experiment Video

Updated: May 30, 2026

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Published on: July 24, 2015

Interaction-driven spectrum reconstruction in bilayer graphene.

A S Mayorov¹, D C Elias, M Mucha-Kruczynski

¹School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, UK.

Science (New York, N.Y.)

|August 13, 2011

Summary

This summary is machine-generated.

Strongly correlated electronic states in bilayer graphene reveal a novel nematic phase transition. This transition, driven by Coulomb interactions, alters rotational symmetry in a two-dimensional material without a magnetic field.

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Area of Science:

Condensed Matter Physics
Materials Science
Quantum Electronics

Background:

Electronic liquids exhibit novel ground states driven by Coulomb interactions.
Strongly correlated electronic systems are key to understanding emergent phenomena.
Bilayer graphene offers a unique platform for studying two-dimensional electronic properties.

Purpose of the Study:

Investigate the nematic phase transition in suspended bilayer graphene.
Explore Coulomb interaction effects on electronic ground states.
Characterize spectrum reconstructions and topological transitions in high-mobility materials.

Main Methods:

Fabrication of suspended bilayer graphene samples.
Annealing to achieve high quasiparticle mobilities (>10^6 cm²/Vs).
Experimental observation of electron topological transitions and spectrum reconstructions.

Main Results:

Observed strong spectrum reconstructions and electron topological transitions.
Attributed these changes to a nematic phase transition.
Demonstrated a decrease in rotational symmetry in bilayer graphene.

Conclusions:

Coulomb interactions drive a new class of electronic ground states in bilayer graphene.
Nematic phase transitions can occur in two-dimensional materials without magnetic fields.
High-quality bilayer graphene reveals surprising interaction effects.