Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 심상완 | - |
dc.date.accessioned | 2019-03-07T00:55:16Z | - |
dc.date.available | 2019-03-07T00:55:16Z | - |
dc.date.issued | 2016-02 | - |
dc.identifier.citation | NATURE COMMUNICATIONS, v. 7, Article no. 10768 | en_US |
dc.identifier.issn | 2041-1723 | - |
dc.identifier.uri | https://www.nature.com/articles/ncomms10768 | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/100555 | - |
dc.description.abstract | The 1s exciton—the ground state of a bound electron-hole pair—is central to understanding the photoresponse of monolayer transition metal dichalcogenides. Above the 1s exciton, recent visible and near-infrared investigations have revealed that the excited excitons are much richer, exhibiting a series of Rydberg-like states. A natural question is then how the internal excitonic transitions are interrelated on photoexcitation. Accessing these intraexcitonic transitions, however, demands a fundamentally different experimental tool capable of probing optical transitions from 1s ‘bright’ to np ‘dark’ states. Here we employ ultrafast mid-infrared spectroscopy to explore the 1s intraexcitonic transitions in monolayer MoS2. We observed twofold 1s→3p intraexcitonic transitions within the A and B excitons and 1s→2p transition between the A and B excitons. Our results revealed that it takes about 0.7 ps for the 1s A exciton to reach quasi-equilibrium; a characteristic time that is associated with a rapid population transfer from the 1s B exciton, providing rich characteristics of many-body exciton dynamics in two-dimensional materials. | en_US |
dc.description.sponsorship | S. Cha, S. Sim, J. Park and H. Choi were supported by the National Research Foundation of Korea (NRF) through the government of Korea (MSIP) (Grants No. NRF-2011-0013255, NRF-2009-0083512, NRF-2015R1A2A1A10052520), Global Frontier Program (2014M3A6B3063709), the Yonsei University Yonsei-SNU Collaborative Research Fund of 2014 and the Yonsei University Future-leading Research Initiative of 2014. J.H.S., H.H. and M.-H.J. were supported by Institute for Basic Science (IBS), Korea under the contract number of IBS-R014-G1-2016-a00. | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | NATURE PUBLISHING GROUP | en_US |
dc.subject | TRANSITION-METAL DICHALCOGENIDES | en_US |
dc.subject | GIANT BANDGAP RENORMALIZATION | en_US |
dc.subject | GAAS QUANTUM-WELLS | en_US |
dc.subject | SINGLE-LAYER MOS2 | en_US |
dc.subject | MONO LAYER | en_US |
dc.subject | TUNGSTEN DISULFIDE | en_US |
dc.subject | CARRIER DYNAMICS | en_US |
dc.subject | STATES | en_US |
dc.subject | HETEROSTRUCTURES | en_US |
dc.subject | WSE2 | en_US |
dc.title | 1s intraexcitonic dynamics in monolayer MoS2 probed by ultrafast mid-infrared spectroscopy | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1038/ncomms10768 | - |
dc.relation.journal | NATURE COMMUNICATIONS | - |
dc.contributor.googleauthor | Cha, Soonyoung | - |
dc.contributor.googleauthor | Sung, Ji Ho | - |
dc.contributor.googleauthor | Sim, Sangwan | - |
dc.contributor.googleauthor | Park, Jun | - |
dc.contributor.googleauthor | Heo, Hoseok | - |
dc.contributor.googleauthor | Jo, Moon-Ho | - |
dc.contributor.googleauthor | Choi, Hyunyong | - |
dc.relation.code | 2016003600 | - |
dc.sector.campus | E | - |
dc.sector.daehak | COLLEGE OF ENGINEERING SCIENCES[E] | - |
dc.sector.department | DIVISION OF ELECTRICAL ENGINEERING | - |
dc.identifier.pid | swsim | - |
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