Chin. Phys. Lett.  2016, Vol. 33 Issue (05): 057801    DOI: 10.1088/0256-307X/33/5/057801
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
Phonon Confinement Effect in Two-dimensional Nanocrystallites of Monolayer MoS$_2$ to Probe Phonon Dispersion Trends Away from Brillouin-Zone Center
Wei Shi, Xin Zhang, Xiao-Li Li, Xiao-Fen Qiao, Jiang-Bin Wu, Jun Zhang, Ping-Heng Tan**
State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
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Wei Shi, Xin Zhang, Xiao-Li Li et al  2016 Chin. Phys. Lett. 33 057801
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Abstract The fundamental momentum conservation requirement $q\sim0$ for the Raman process is relaxed in the nanocrystallites (NCs), and phonons away from the Brillouin-zone center will be involved in the Raman scattering, which is well-known as the phonon confinement effect in NCs. This usually gives a downshift and asymmetric broadening of the Raman peak in various NCs. Recently, the $A'_1$ mode of 1L MoS$_2$ NCs is found to exhibit a blue shift and asymmetric broadening toward the high-frequency side [Chem. Soc. Rev. 44 (2015) 2757 and Phys. Rev. B 91 (2015) 195411]. In this work, we carefully check this issue by studying Raman spectra of 1L MoS$_2$ NCs prepared by the ion implantation technique in a wide range of ion-implanted dosage. The same confinement coefficient is used for both $E'$ and $A'_1$ modes in 1L MoS$_2$ NCs since the phonon uncertainty in an NC is mainly determined by its domain size. The asymmetrical broadening near the $A'_1$ and $E'$ modes is attributed to the appearance of defect-activated phonons at the zone edge and the intrinsic asymmetrical broadening of the two modes, where the anisotropy of phonon dispersion curves along ${\it \Gamma}$–$K$ and ${\it \Gamma}$–$M$ is also considered. The photoluminescence spectra confirm the formation of small domain size of 1L MoS$_2$ nanocrystallites in the ion-implanted 1L MoS$_2$. This study provides not only an approach to quickly probe phonon dispersion trends of 2D materials away from ${\it \Gamma}$ by the Raman scattering of the corresponding NCs, but also a reference to completely understand the confinement effect of different modes in various nanomaterials.
Received: 03 March 2016      Published: 31 May 2016
PACS:  78.30.Ly (Disordered solids)  
  61.72.U- (Doping and impurity implantation)  
  63.20.D- (Phonon states and bands, normal modes, and phonon dispersion)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/33/5/057801       OR      https://cpl.iphy.ac.cn/Y2016/V33/I05/057801
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Wei Shi
Xin Zhang
Xiao-Li Li
Xiao-Fen Qiao
Jiang-Bin Wu
Jun Zhang
Ping-Heng Tan
[1]Novoselov K S, Geim A K, Morozov S V, Jiang D, Katsnelson M I, Grigorieva I V, Dubonos S V and Firsov A A 2005 Nature 438 197
[2]Wang Q H, Kalantar Z K, Kis A, Coleman J N and Strano M S 2012 Nat. Nanotechnol. 7 699
[3]Chhowalla M, Shin H S, Eda G, Li L J, Loh K P and Zhang H 2013 Nat. Chem. 5 263
[4]Mak K F, Lee C, Hone J, Shan J and Heinz T F 2010 Phys. Rev. Lett. 105 136805
[5]Yao Z, Kane C L and Dekker C 2000 Phys. Rev. Lett. 84 2941
[6]Kaasbjerg K, Thygesen K S and Jacobsen K W 2012 Phys. Rev. B 85 115317
[7]Zeng H L, Dai J F, Yao W, Xiao D and Cui X D 2012 Nat. Nanotechnol. 7 490
[8]Richter H, Wang Z and Ley L 1981 Solid State Commun. 39 625
[9]Campbell I and Fauchet P 1986 Solid State Commun. 58 739
[10]Comas F, Trallero Giner C and Riera R 1989 Phys. Rev. B 39 5907
[11]Zi J, Zhang K M and Xie X D 1998 Phys. Rev. B 58 6712
[12]Arora A K, Rajalakshmi M, Ravindran T R and Sivasubramanian V 2007 J. Raman Spectrosc. 38 604
[13]Gouadec G and Colomban P 2007 Prog. Cryst. Growth Des. Charact. Mater. 53 1
[14]Adu K, Williams M, Reber M, Jayasingha R, Gutierrez H and Sumanasekera G 2012 J. Nanotechnol. 2012 18
[15]Zhang X, Qiao X F, Shi W, Wu J B, Jiang D S and Tan P H 2015 Chem. Soc. Rev. 44 2757
[16]Mignuzzi S, Pollard A J, Bonini N, Brennan B, Gilmore I S, Pimenta M A, Richards D and Roy D 2015 Phys. Rev. B 91 195411
[17]Qiao X F, Li X L, Zhang X, Shi W, Wu J B, Chen T and Tan P H 2015 Appl. Phys. Lett. 106 223102
[18]Ferreira E H M, Moutinho M V O, Stavale F, Lucchese M M, Capaz R B, Achete C A and Jorio A 2010 Phys. Rev. B 82 125429
[19]Li Q Q, Zhang X, Han W P, Lu Y, Shi W, Wu J B and Tan P H 2015 Carbon 85 221
[20]Chow P K, Gedrim R B J, Gao J, Lu T M, Yu B, Terrones H and Koratkar N 2015 ACS Nano 9 1520
[21]Tongay S, Suh J, Ataca C, Fan W, Luce A, Kang J S, Liu J, Ko C, Raghunathanan R, Zhou J, Ogletree F, Li J, Grossman J C and Wu J 2013 Sci. Rep. 3 2657
[22]Yu P Y and Cardona M 2005 Fundamentals of Semiconductors: Physics and Materials Properties 3rd edn (Berlin: Springer-Verlag)
[23]Molina-Sánchez A and Wirtz L 2011 Phys. Rev. B 84 155413
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