The paper derives an entropy-based shear stress law for twisted bilayer graphene, tau = 3 k T cot(theta/2) / (2 pi R^3), and argues configurational entropy is the origin of structural superlubricity.
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Thermodynamic model of twisted bilayer graphene: Configuration entropy matters
The paper derives an entropy-based shear stress law for twisted bilayer graphene, tau = 3 k T cot(theta/2) / (2 pi R^3), and argues configurational entropy is the origin of structural superlubricity.