Temperature-dependent phonon shifts in monolayer MoS2

By N. Lanzillo, A. G. Birdwell, M. Amani, F. Crowne, P. Shah, S. Najmaei, Zheng Liu, Pulickel M. Ajayan, J. Lou, Madan Dubey and 2 more. 2013

241 citations recorded by the source corpus.

We present a combined experimental and computational study of two-dimensional molybdenum disulfide and the effect of temperature on the frequency shifts of the Raman-active E2g and A1g modes in the monolayer. While both peaks show an expected red-shift with increasing temperature, the frequency shift is larger for the A1g mode than for the E2g mode. This is in contrast to previously reported bulk behavior, in which the E2g mode shows a larger frequency shift with temperature. The temperature dependence of these phonon shifts is attributed to the anharmonic contributions to the ionic interaction potential in the two-dimensional system.

Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/a9ca102578e8ff8878d99eb7f5ed1fd5d25139b6

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In Materials Chemistry

1. T. Yu
2. Chunxiao Cong
3. Kai Liu
4. Yanlong Wang
5. Yinghui Sun
6. Xuewen Wang
7. J. Shang
8. Junyong Kang

Citations in the corpus

• Strain-induced direct–indirect bandgap transition and phonon modulation in monolayer WS2 (2015, background): “Because the  1 A mode is reported to be more susceptible to laser-induced heating [57] and temperature [58, 59] than the E’ mode for monolayer TMDs, its unexpected redshift under strain is understandable.”
• Chemical and structural stability of 2D layered materials (2019, background): “[161] Lanzillo N A et al 2013 Temperature-dependent phonon shifts in monolayer MoS2 Appl.”