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Attend a physics colloquium exploring the revolutionary field of twist-controlled van der Waals heterostructures in two-dimensional materials. Learn how controlling the twist angle between different 2D crystals in heterostructures has emerged as a powerful new tool for electronic materials design, moving beyond the traditional approach of combining materials with similar lattice constants. Discover how this twist control opens new pathways to tailor interaction and topology in van der Waals heterostructures, fundamentally changing how we approach band engineering in semiconductor systems. Examine experimental advances in creating twist-controlled van der Waals heterostructures, including detailed examples of twist-controlled double layers with independent electrical contacts and the formation of twist-controlled moiré patterns in graphene systems. Understand how van der Waals bonding allows for the stacking of 2D materials without the lattice matching constraints of traditional epitaxial growth, enabling unprecedented control over electronic properties through geometric manipulation. Explore the implications of this technology for developing new electronic devices and materials with tunable characteristics, and gain insights into how twist angle engineering is reshaping the landscape of condensed matter physics and materials science.
