TY - JOUR
T1 - Raman Signature of Stripe Domains in Monolayer WxMo1-xS2 Alloys
AU - Sheremetyeva, Natalya
AU - Zhang, Na
AU - Sanchez, David Emanuel
AU - Yu, Zhuohang
AU - Lamparski, Michael
AU - Terrones, Mauricio
AU - Meunier, Vincent
N1 - Publisher Copyright:
© 2025 American Chemical Society.
PY - 2025/1/22
Y1 - 2025/1/22
N2 - We study the Raman signature of stripe domains in monolayer WxMo1-xS2 alloys, characterized using experimental techniques and density functional theory (DFT) calculations. These stripe domains were found in star-shaped monolayer WS2 exhibiting a high concentration of molybdenum (Mo) atoms in its central region, and unique Raman peaks that were not previously reported. We attribute these peaks to the splitting of the original doubly degenerate E2g modes, arising from the lower symmetry of the W-Mo stripe domains. We confirm the stripe presence and location using high-resolution scanning transmission electron microscopy (STEM) imaging and use DFT to elucidate the structural, electronic, and vibrational properties of the stripes when the stoichiometry corresponds to W0.5Mo0.5S2. The findings provide insight into the evolution of the Raman spectra as stripe domains arise in TMD alloys, thus contributing to a broader understanding of the influence of atomic-level structural modifications on material properties.
AB - We study the Raman signature of stripe domains in monolayer WxMo1-xS2 alloys, characterized using experimental techniques and density functional theory (DFT) calculations. These stripe domains were found in star-shaped monolayer WS2 exhibiting a high concentration of molybdenum (Mo) atoms in its central region, and unique Raman peaks that were not previously reported. We attribute these peaks to the splitting of the original doubly degenerate E2g modes, arising from the lower symmetry of the W-Mo stripe domains. We confirm the stripe presence and location using high-resolution scanning transmission electron microscopy (STEM) imaging and use DFT to elucidate the structural, electronic, and vibrational properties of the stripes when the stoichiometry corresponds to W0.5Mo0.5S2. The findings provide insight into the evolution of the Raman spectra as stripe domains arise in TMD alloys, thus contributing to a broader understanding of the influence of atomic-level structural modifications on material properties.
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U2 - 10.1021/acsami.4c15937
DO - 10.1021/acsami.4c15937
M3 - Article
C2 - 39792137
AN - SCOPUS:85214560269
SN - 1944-8244
VL - 17
SP - 5430
EP - 5438
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 3
ER -