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Spin-orbit splitting in single-layer MoS2 revealed by triply resonant Raman scattering

Spin-orbit splitting in single-layer MoS2 revealed by triply resonant Raman scattering
Spin-orbit splitting in single-layer MoS2 revealed by triply resonant Raman scattering
Although new spintronic devices based on the giant spin-orbit splitting of single-layer MoS2 have been proposed, such splitting has not been studied effectively in experiments. This Letter reports the valence band spin-orbit splitting in single-layer MoS2 for the first time, probed by the triply resonant Raman scattering process. We found that upon 325 nm laser irradiation, the second order overtone and combination Raman modes of single-layer MoS2 are dramatically enhanced. Such resonant Raman enhancement arises from the electron-two-phonon triple resonance via the deformation potential and Fröhlich interaction. As a sensitive and precise probe for the spin-orbit splitting, the triply resonant Raman scattering will provide a new and independent route to study the spin characteristics of MoS2.
Sun, Linfeng
94cc6175-021f-4ec1-a85f-fcb26e033aa6
Yan, Jiaxu
7dac0ede-1dc6-4cb8-9014-663ea65acbe0
Zhan, Da
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Liu, Lei
51ddf4cf-b2db-43ad-8e3b-46f0e110f3b2
Hu, Hailong
145c992d-2766-43fe-9cc4-f022665eb08a
Li, Hong
44d51d43-1fe5-4d15-820d-22d302b9e1a7
Tay, Ben Kang
2ec81582-c689-418e-9ebb-066d208e47ad
Kuo, Jer-Lai
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Huang, Chung-Che
825f7447-6d02-48f6-b95a-fa33da71f106
Hewak, Daniel W.
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Lee, Pooi See
2f3f298d-6c9f-4944-836c-31437bd6d4dd
Shen, Ze Xiang
e75ccea8-c6ea-47e0-be67-9ca467450c2e
Sun, Linfeng
94cc6175-021f-4ec1-a85f-fcb26e033aa6
Yan, Jiaxu
7dac0ede-1dc6-4cb8-9014-663ea65acbe0
Zhan, Da
8fc86402-c8a6-49fd-849d-2fcc07e88cad
Liu, Lei
51ddf4cf-b2db-43ad-8e3b-46f0e110f3b2
Hu, Hailong
145c992d-2766-43fe-9cc4-f022665eb08a
Li, Hong
44d51d43-1fe5-4d15-820d-22d302b9e1a7
Tay, Ben Kang
2ec81582-c689-418e-9ebb-066d208e47ad
Kuo, Jer-Lai
f1a80d80-e1af-4472-8603-9b0a523134c3
Huang, Chung-Che
825f7447-6d02-48f6-b95a-fa33da71f106
Hewak, Daniel W.
87c80070-c101-4f7a-914f-4cc3131e3db0
Lee, Pooi See
2f3f298d-6c9f-4944-836c-31437bd6d4dd
Shen, Ze Xiang
e75ccea8-c6ea-47e0-be67-9ca467450c2e

Sun, Linfeng, Yan, Jiaxu, Zhan, Da, Liu, Lei, Hu, Hailong, Li, Hong, Tay, Ben Kang, Kuo, Jer-Lai, Huang, Chung-Che, Hewak, Daniel W., Lee, Pooi See and Shen, Ze Xiang (2013) Spin-orbit splitting in single-layer MoS2 revealed by triply resonant Raman scattering. Physical Review Letters, 111 (12), [126801]. (doi:10.1103/PhysRevLett.111.126801).

Record type: Article

Abstract

Although new spintronic devices based on the giant spin-orbit splitting of single-layer MoS2 have been proposed, such splitting has not been studied effectively in experiments. This Letter reports the valence band spin-orbit splitting in single-layer MoS2 for the first time, probed by the triply resonant Raman scattering process. We found that upon 325 nm laser irradiation, the second order overtone and combination Raman modes of single-layer MoS2 are dramatically enhanced. Such resonant Raman enhancement arises from the electron-two-phonon triple resonance via the deformation potential and Fröhlich interaction. As a sensitive and precise probe for the spin-orbit splitting, the triply resonant Raman scattering will provide a new and independent route to study the spin characteristics of MoS2.

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Published date: 17 September 2013
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 359709
URI: http://eprints.soton.ac.uk/id/eprint/359709
PURE UUID: 0847463c-db8c-40e9-b519-9b37010d5b35
ORCID for Chung-Che Huang: ORCID iD orcid.org/0000-0003-3471-2463
ORCID for Daniel W. Hewak: ORCID iD orcid.org/0000-0002-2093-5773

Catalogue record

Date deposited: 11 Nov 2013 10:28
Last modified: 18 Feb 2021 17:05

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Contributors

Author: Linfeng Sun
Author: Jiaxu Yan
Author: Da Zhan
Author: Lei Liu
Author: Hailong Hu
Author: Hong Li
Author: Ben Kang Tay
Author: Jer-Lai Kuo
Author: Chung-Che Huang ORCID iD
Author: Daniel W. Hewak ORCID iD
Author: Pooi See Lee
Author: Ze Xiang Shen

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