Anomalous lattice vibrations of monolayer MoS2 probed by ultraviolet Raman scattering
Liu, Hsiang-Lin; Guo, Huaihong; Yang, Teng; Zhang, Zhidong; Kumamoto, Yasuaki; Shen, Chih-Chiang; Hsu, Yu-Te; Li, Lain-Jong; Saito, Riichiro; Kawata, Satoshi;
AbstractWe present a comprehensive Raman scattering study of monolayer MoS2 with increasing laser excitation energies ranging from the near-infrared to the deep-ultraviolet. The Raman scattering intensities from the second-order phonon modes are revealed to be enhanced anomalously by only the ultraviolet excitation wavelength 354 nm. We demonstrate theoretically that such resonant behavior arises from a strong optical absorption that forms near the Gamma point and 1/2 (Gamma K) over right arrow of the band structure and an inter-valley resonant electronic scattering by the M-point phonons. These results advance our understanding of the double resonance Raman scattering process in low-dimensional semiconducting nanomaterials and provide a foundation for the technological development of monolayer MoS2 in the ultraviolet frequency range.
description.department[liu, hsiang-lin ; shen, chih-chiang] natl taiwan normal univ, dept phys, taipei 11677, taiwan ; [guo, huaihong ; yang, teng ; saito, riichiro] tohoku univ, dept phys, sendai, miyagi 9808578, japan ; [yang, teng ; zhang, zhidong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [kumamoto, yasuaki ; kawata, satoshi] riken, near field nanophoton res team, wako, saitama 3510198, japan ; [hsu, yu-te ; li, lain-jong] acad sinica, inst atom & mol sci, taipei 10617, taiwan ; [li, lain-jong] king abdullah univ sci & technol, phys sci & engn div, thuwal 239556900, saudi arabia ; [kawata, satoshi] osaka univ, dept appl phys, suita, osaka 5650871, japan
Funding OrganizationMinistry of Science and Technology of Republic of China [NSC 102-2112-M-003-002-MY3]; NSFC [51331006]; Key Research Program of Chinese Academy of Sciences [KGZD-EW-T06]; Taiwan Consortium of Emergent Crystalline Materials (TCECM); Ministry of Science and Technology; USA AFOSR BRI [FA238615100015]; MEXT-Japan [25107005, 25286005]; JSPS-Japan [21226003]
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WOS IDWOS:000355633400032
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Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
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Liu, Hsiang-Lin,Guo, Huaihong,Yang, Teng,et al. Anomalous lattice vibrations of monolayer MoS2 probed by ultraviolet Raman scattering[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2015,17(22):14561-14568.
APA Liu, Hsiang-Lin.,Guo, Huaihong.,Yang, Teng.,Zhang, Zhidong.,Kumamoto, Yasuaki.,...& lattice vibrations of monolayer MoS2 probed by ultraviolet Raman scattering.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,17(22),14561-14568.
MLA Liu, Hsiang-Lin,et al."Anomalous lattice vibrations of monolayer MoS2 probed by ultraviolet Raman scattering".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 17.22(2015):14561-14568.
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