Abstract
A new structure of germanene had predicted theoretically. We investigated its vibrational properties and calculated the polarization direction dependent Raman spectra. The five Raman active modes [50.7 cm−1 (Eg), 189.8 cm−1 (B1g), 188.5 cm−1 (B2g), 190.4 cm−1 (B2g) and 256.7 cm−1 (A1g)] are got. By calculating Raman tensor of each Raman active mode, we obtained polarization angle dependent Raman intensities. In addition, the Raman spectra of Ge(tP12) (one of the most common germanium crystals) is calculated for comparison. The different Raman spectra results can help material scientists to identify the existence of tetragonal-structure germanene when they are growing it.
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Acknowledgements
This work was supported by Key-Area Research and Development Program of GuangDong Province (2019B030330001), Science and Technology Projects in Guangzhou (No. 202102080361), National R&D Key Plan Project of China (2016YFA0202000), Guangzhou Science Technology and Innovation Commission (grant no. 201607020012), Natural Science Foundation of Guangdong Province (2018B030311045) and Physical Research Platform (PRP) in School of Physics, SYSU.
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He, C., Wang, W. Tetragonal-structure germanene van der Waals 2D crystal and its Raman spectra. Appl. Phys. A 128, 363 (2022). https://doi.org/10.1007/s00339-022-05492-2
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DOI: https://doi.org/10.1007/s00339-022-05492-2