Lattice Vibrational Modes and Raman Scattering Spectra of Strained Phosphorene
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Strain is prominent in fabricated samples of two-dimensional semiconductors and it also serves as an exploitable tool for engineering their properties. However, quantifying strain and characterizing its spatially inhomogeneous distribution across a material are challenging tasks. Here, we report the lattice vibrational modes and corresponding Raman spectra of strained monolayer black phosphorus (phosphorene) by first-principles simulations. We show that frequencies of vibrational modes of phosphorene and their Raman scattering peaks exhibit substantial and distinct shifts according to the types and size of strain. Therefore, combined with high spatial-resolution Raman scattering measurements, our calculated results can quantify strain distributions in phosphorene. This information is essential for understanding structures of future large-scale fabrication and strain engineering of phosphorene.
Subfields: Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/fcca252693fd223bab50dc120a3c05c264a41a56
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In Materials Chemistry
Citations in the corpus
- Recent advances in synthesis, properties, and applications of phosphorene (2017, background): “Additionally, they have suggested that due to its strong and linear strain dependence, luminescence peak can be used to probe directly the strain state of single layer phosphorene as an alternative to using Raman peaks, which are weakly affected by AM strain.(23) However, the use of PL as an experim”
- Modulation of electronic and mechanical properties of phosphorene through strain (2014, background): “[48] appeared in which the authors report a substantial shift of Raman peaks via strain engineering in phosphorene.”
- Novel effects of strains in graphene and other two dimensional materials (2015, methodology): “By applying appropriate uniaxial or biaxial strain in single layer and few-layer BP, it has been shown that the anisotrop of the electron effective mass and corresponding mobility direction can be rotated by 90◦ while the anisotropy of holes i not affecte by th strain [89].”
- Recent Advances in the Study of Phosphorene and its Nanostructures (2017, methodology): “(© AIP Publishing, LLC. Adapted with permission from Fei and Yang.143 Permission to reuse must be obtained from the rightsholder.) phonon–phonon scattering can be neglected.145 Using first-principles calculations, Ong et al.30 found the thermal conductance, G, along the ZZ and AC directions in the b”
- Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus (2015, methodology): “tion. Along the length direction, the intensity profile was extracted directly from the raw RGB data of a CCD camera and fitted with Gaussian function to obtain l 0 ( ) 2 l l l c / 0 I Ce l l = − − . (6) We performed knife-edge measurements to characterize the width of the focal line. A Si wafer wit”