Fig. 2: Extended topological valley-locked states for SAWs.
From: Extended topological valley-locked surface acoustic waves
a–c (bottom) Schematics of three heterostructured valley interfaces (see SEM images in Fig. S2), with increasing molecular layers (from 3, 5, to 7, respectively) of SAW “semimetal” (SM) doped inside a VA and a VB. (upper) Experimentally measured SAW out-of-plane amplitude distributions crossing the doping areas. d–f Calculated and experimentally measured band structures of the heterostructured interfaces. The color bar represents the density of energy. g–i Simulated and experimentally imaged SAW out-of-plane displacement and phase distributions of the heterostructured interfaces (at 76 MHz shown in the figures), demonstrating a pseudo-diffusion-like phase uniformity of these edge states.
