1. Mak, K. F., He, K., Shan, J. & Heinz, T. F. Control of valley polarization in monolayer MoS2 by optical helicity. Nat. Nanotechnol. 7, 494–498 (2012).
2. Zhu, H. et al. Observation of chiral phonons. Science 359, 579–582 (2018).
3. Baranowski, M. et al. Dark excitons and the elusive valley polarization in transition metal dichalcogenides. 2D Mater.4, 025016 (2017).
4. Chow, C. M. et al. Phonon-assisted oscillatory exciton dynamics in monolayer MoSe2. npj 2D Mater. Appl. 1, 33 (2017).
5. Christiansen, D. et al. Phonon sidebands in monolayer transition metal dichalcogenides. Phys. Rev. Lett. 119, 187402 (2017).
6. Molina-Sanchez, A., Sangalli, D., Wirtz, L. & Marini, A. Ab Initio calculations of ultrashort carrier dynamics in two-dimensional materials: valley depolarization in single-layer WSe2. Nano Lett. 17, 4549–4555 (2017).
7. Wang, Z. et al. Intravalley spin-flip relaxation dynamics in singlelayer WS2. Nano Lett. 18, 6882–6891 (2018).
8. Li, Z. et al. Momentum-dark intervalley exciton in monolayer tungsten diselenide brightened via chiral phonon. ACS Nano 13, 14107–14113 (2019).
9. Brem, S. et al. Phonon-assisted photoluminescence from indirect excitons in monolayers of transition-metal dichalcogenides. Nano. Lett. 20, 2849–2856 (2020).
10. He, M. et al. Valley phonons and exciton complexes in a monolayer semiconductor. Nat. Commun. 11, 618 (2020).
11. Liu, E. et al. Multipath optical recombination of intervalley dark excitons and trions in monolayer WSe2. Phys. Rev. Lett. 124, 196802 (2020).
12. Wang, G. et al. Polarization and time-resolved photoluminescence spectroscopy of excitons in MoSe2 monolayers. Appl. Phys. Lett. 106, 112101 (2015).
13. Berkdemir, A. et al. Identification of individual and few layers of WS2 using Raman Spectroscopy. Sci. Rep. 3, 1755 (2013).
14. Gołasa, K. et al. Multiphonon resonant Raman scattering in MoS2. Appl. Phys. Lett. 104, 092106 (2014).
15. Nam, D., Lee, J. U. & Cheong, H. Excitation energy dependent Raman spectrum of MoSe2. Sci. Rep. 5, 17113 (2015).
16. Soubelet, P., Bruchhausen, A. E., Fainstein, A., Nogajewski, K. & Faugeras, C. Resonance effects in the Raman scattering of monolayer and few-layerMoSe2. Phys. Rev. B 93, 155407 (2016).
17. Carvalho, B. R. et al. Intervalley scattering by acoustic phonons in two-dimensional MoS2 revealed by double-resonance Raman spectroscopy. Nat. Commun. 8, 14670 (2017).
18. Li, J.-M. et al. Double resonance Raman scattering in single-layer MoSe2 under moderate pressure. Chin. Phys. Lett. 36, 048201 (2019).
19. Shree, S. et al. Observation of exciton-phonon coupling in MoSe2 monolayers. Phys. Rev. B 98, 035302 (2018).
20. Jeong, T. Y. et al. Valley depolarization in monolayer transitionmetal dichalcogenides with zone-corner acoustic phonons. Nanoscale 12, 22487–22494 (2020).
21. Jeong, T. Y. et al. Coherent lattice vibrations in mono- and few-layer WSe2. ACS Nano 10, 5560–5566 (2016).
22. Tornatzky, H., Gillen, R., Uchiyama, H. & Maultzsch, J. Phonon dispersion in MoS2. Phys. Rev. B 99, 144309 (2019).
23. Trovatello, C. et al. Strongly coupled coherent phonons in singlelayer MoS2. ACS Nano 14, 5700–5710 (2020).
24. Kioseoglou, G., Hanbicki, A. T., Currie, M., Friedman, A. L. & Jonker, B. T. Optical polarization and intervalley scattering in single layers of MoS2 and MoSe2. Sci. Rep. 6, 25041 (2016).
25. Liu, E. et al. Valley-selective chiral phonon replicas of dark excitons and trions in monolayer WSe2. Phys. Rev. Res. 1, 032007 (2019).
26. Kresse, G. & Joubert, D. From ultrasoft pseudopotentials to the projector augmented-wave method. Phys. Rev. B 59, 1758–1775 (1999).
27. Kresse, G. & Furthmuller, J. Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set. Phys. Rev. B 54, 11169–11186 (1996).
28. Kresse, G. & Furthmüller, J. Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set. Comput. Mater. Sci. 6, 15–50 (1996).
29. Kresse, G. & Hafner, J. Ab initio molecular dynamics for liquid metals. Phys. Rev. B 47, 558–561 (1993).
30. Togo, A. & Tanaka, I. First principles phonon calculations in materials science. Scr. Mater. 108, 1–5 (2015).
31. Perdew, J. P. et al. Restoring the density-gradient expansion for exchange in solids and surfaces. Phys. Rev. Lett. 100, 136406 (2008).
32. Paier, J., Marsman, M. & Kresse, G. Dielectric properties and excitons for extended systems from hybrid functionals. Phys. Rev. B 78, 121201 (2008).
33. Wang, V., Xu, N., Liu, J.-C., Tang, G. & Geng, W.-T. VASPKIT: A userfriendly interface facilitating high-throughput computing and analysis using VASP code. Comput. Phys. Commun. 267, 108033 (2021).