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Magic Angle Twisted Bilayer Graphene

All articles tagged with #magic angle twisted bilayer graphene

science-and-technology2 years ago

"Revolutionary Insights: Visualizing Interacting Electrons in Magic-Angle Twisted Bilayer Graphene"

Researchers at Princeton University have used advanced microscopy techniques to image the microscopic behavior of interacting electrons in magic-angle twisted bilayer graphene (MATBG), shedding light on the insulating quantum phase of the material. By creating pristine samples and using a scanning tunneling microscope, the team captured precise visualizations of the electron behavior and developed a theoretical framework to interpret their findings. This breakthrough could lead to a better understanding of quantum phases in MATBG and pave the way for future quantum technological advancements.

science-and-technology2 years ago

Unveiling the Quantum Textures of Magic-Angle Graphene's Many-Body Wavefunctions

Researchers have used high-resolution scanning tunnelling microscopy to study the wavefunctions of correlated phases in magic-angle twisted bilayer graphene (MATBG). They found distinct broken-symmetry patterns in the wavefunctions of gapped phases, including correlated insulating, pseudogap, and superconducting phases. The researchers introduced a symmetry-based analysis using complex-valued local order parameters, which revealed intricate textures that distinguish the various correlated phases. The observed quantum textures closely match those of the proposed incommensurate Kekulé spiral order in typical MATBG devices, while ultralow-strain samples exhibit local symmetries similar to a time-reversal symmetric intervalley coherent phase. The superconducting state of MATBG also shows strong signatures of intervalley coherence.