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View article: Coherent acoustic phonons in a coupled hexagonal boron nitride–graphite heterostructure
Coherent acoustic phonons in a coupled hexagonal boron nitride–graphite heterostructure Open
Femtosecond optically excited coherent acoustic phonon modes (CAPs) are investigated in a free-standing van der Waals heterostructure composed of a 20-nm transparent hexagonal boron nitride (hBN) and a 42-nm opaque graphite layer. Employin…