Extended Data Fig. 7: Calculated EPC for the theoretical model in Methods section ‘Theory model for inelastic tunnelling through phonon emission and the two mechanisms of EPC’.
From: Quantum twisting microscopy of phonons in twisted bilayer graphene
a–c, EPC contributions from the in-layer (red) and interlayer (blue) mechanisms for the TA, LA and TO/LO modes as a function of the twist angle. In c, the contribution from the TO and LO modes are further decomposed. In the experiment, the individual contribution of the TO and LO modes cannot be distinguished. However, in this plot, both modes contribute, with the TO mode having the dominant effect. d,e, The phonon dispersion and bare in-layer EPC for the TO and LO modes near the K point. f, Comparison of the extracted conductance step, ΔGoptical/2βνTνBAtip, with the theory estimates \({(\alpha \sqrt{{N}_{{\rm{layer}}}}| {g}_{{\rm{in-layer}},r,{q}_{{\rm{M}}}}| )}^{2}\) and \({| {g}_{{\rm{interlayer}},r,{q}_{{\rm{M}}}}| }^{2}\) for both TO and LO modes. The legend notations for TO, LO and interlayer/in-layer mechanisms follow those in panel c.
