. Author manuscript; available in PMC: 2020 Nov 19.

Published in final edited form as: Commun Phys. 2020;3:https://doi.org/10.1038/s42005-019-0277-7.

Table 1.

Raman mode assignments.

1H-WSe₂
Label	Position (cm⁻¹)	Assignment
1	132	Unknown
2	223	E′ (K)^a
3	240	E′ (M)^a
4	250	$A_{1}^{'}$ + E′
5	264	2LA(M)^a,b
6	351	2E′(Γ)^b or $A_{1}^{'}$ (M) + TA(M)^b
7	378	[E′(Γ) or $A_{1}^{'}$ (Γ)] + LA(M)^a,b
8	401	[E′(Γ) or $A_{1}^{'}$ (Γ)] + LA(K)^a or 3LA(M)^a,b
T_d-WTe₂ (bilayer)
Label	Position (cm⁻¹)	Assignment
a	87	A₂
b	107	A₂
c	166	A₁
d	218	A₁
e	327	2A₁ (2 × peak c) or A₁+ A₂ (peak d + peak b)

1H-WSe₂ and T_d-WTe₂ (bilayer) vibrational mode symmetry assignments for the peaks identified in Fig. 2a, b. WSe₂ peaks are labeled with numbers and WTe₂ peaks are labeled with letters. The superscripts a and b refer to assignments made by del Corro et al.³⁴ and Zhaoet al.³⁵, respectively