Strain-induced vibrational properties of few layer black phosphorus and MoTe 2 via Raman spectroscopy
Abstract
We studied and compared the effect of tensile strain on the Raman spectra of black phosphorus (BP) and molybdenum ditelluride (MoTe2) crystals by using a simple custom strain device. In-situ Raman spectroscopy on BP revealed clear red-shifting of all three phonon modes, A1g, B2g and A2g, under tensile stress. From our theoretical analyses, we found that such red shifting strongly depends on the direction of the strain exerted on the system even within the elastic deformation limit (i.e., strain ≤ 1 %). In particular, calculated results for the strain along the armchair direction are consistent with our experimental data, confirming that the strain applied to the sample acts effectively along the armchair direction. In a comparative study, we found that the effect of strain on the Raman shifting is larger for BP than that for MoTe2, presumably due to the smaller Young’s modulus of BP. We also see a remarkable resemblance between donor-type intercalation induced vibrational properties and tensile stress-induced vibrational properties in BP. We anticipate that our method of in-situ Raman spectroscopy can be an effective tool that can allow observation of strain effect directly which is critical for future flexible electronic devices.
- Publication Date:
- Research Org.:
- Univ. of Louisville, KY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1644235
- Alternate Identifier(s):
- OSTI ID: 1644236; OSTI ID: 1684623; OSTI ID: 1773973
- Grant/Contract Number:
- SC0019348
- Resource Type:
- Published Article
- Journal Name:
- Nanotechnology
- Additional Journal Information:
- Journal Name: Nanotechnology Journal Volume: 31 Journal Issue: 42; Journal ID: ISSN 0957-4484
- Publisher:
- IOP Publishing
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY
Citation Formats
Karki, Bhupendra, Freelon, Byron, Rajapakse, Manthila, Musa, Rajib, Riyadh, S. M. Shah, Morris, Blake, Abu, Usman, Yu, Ming, Sumanasekera, Gamini, and Jasinski, Jacek B. Strain-induced vibrational properties of few layer black phosphorus and MoTe 2 via Raman spectroscopy. United Kingdom: N. p., 2020.
Web. doi:10.1088/1361-6528/aba13e.
Karki, Bhupendra, Freelon, Byron, Rajapakse, Manthila, Musa, Rajib, Riyadh, S. M. Shah, Morris, Blake, Abu, Usman, Yu, Ming, Sumanasekera, Gamini, & Jasinski, Jacek B. Strain-induced vibrational properties of few layer black phosphorus and MoTe 2 via Raman spectroscopy. United Kingdom. https://doi.org/10.1088/1361-6528/aba13e
Karki, Bhupendra, Freelon, Byron, Rajapakse, Manthila, Musa, Rajib, Riyadh, S. M. Shah, Morris, Blake, Abu, Usman, Yu, Ming, Sumanasekera, Gamini, and Jasinski, Jacek B. Fri .
"Strain-induced vibrational properties of few layer black phosphorus and MoTe 2 via Raman spectroscopy". United Kingdom. https://doi.org/10.1088/1361-6528/aba13e.
@article{osti_1644235,
title = {Strain-induced vibrational properties of few layer black phosphorus and MoTe 2 via Raman spectroscopy},
author = {Karki, Bhupendra and Freelon, Byron and Rajapakse, Manthila and Musa, Rajib and Riyadh, S. M. Shah and Morris, Blake and Abu, Usman and Yu, Ming and Sumanasekera, Gamini and Jasinski, Jacek B.},
abstractNote = {We studied and compared the effect of tensile strain on the Raman spectra of black phosphorus (BP) and molybdenum ditelluride (MoTe2) crystals by using a simple custom strain device. In-situ Raman spectroscopy on BP revealed clear red-shifting of all three phonon modes, A1g, B2g and A2g, under tensile stress. From our theoretical analyses, we found that such red shifting strongly depends on the direction of the strain exerted on the system even within the elastic deformation limit (i.e., strain ≤ 1 %). In particular, calculated results for the strain along the armchair direction are consistent with our experimental data, confirming that the strain applied to the sample acts effectively along the armchair direction. In a comparative study, we found that the effect of strain on the Raman shifting is larger for BP than that for MoTe2, presumably due to the smaller Young’s modulus of BP. We also see a remarkable resemblance between donor-type intercalation induced vibrational properties and tensile stress-induced vibrational properties in BP. We anticipate that our method of in-situ Raman spectroscopy can be an effective tool that can allow observation of strain effect directly which is critical for future flexible electronic devices.},
doi = {10.1088/1361-6528/aba13e},
journal = {Nanotechnology},
number = 42,
volume = 31,
place = {United Kingdom},
year = {Fri Jul 31 00:00:00 EDT 2020},
month = {Fri Jul 31 00:00:00 EDT 2020}
}
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https://doi.org/10.1088/1361-6528/aba13e
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