Fig. 4
From: Cross-dimensional electron-phonon coupling in van der Waals heterostructures
Schematic diagram for constituent-vdWH EPC of the LB modes in hBN/WS2 vdWHs. a Raman spectrum of a 39L-hBN/3LW in the region of 5~50 cm−1 and the normal mode displacements (red arrows) of the LB42,37, LB42,36, LB42,32, and LB42,29 modes in a 39L-hBN/3LW and the LB3,2 in a standalone 3LW flake. The triangles represent the representative expected LB modes in the 39L-hBN/3LW based on the LCM. In the nL-hBN/3LW (n = 39), \(\alpha _i^\prime\)(BN) (i = 1, 2, …, n) and \(\alpha _j^\prime\)(W) (j = 1, 2, 3) are the polarizability derivative of the entire layer i from hBN constituents and layer j from WS2 constituents with respective to the displacement in the z direction. b The modulus square of the projection from wavefunction of different LB modes in 39L-hBN/3LW vdWH onto the wavefunction of the LB3,2 mode in a standalone 3LW flake. c The relative intensity of LB modes in 39L-hBN/3LW vdWH based on the interlayer bond polarizability model
