Coupled valence carrier and core-exciton dynamics in WS2 probed by few-femtosecond extreme ultraviolet transient absorption spectroscopy
DC Field | Value | Language |
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dc.contributor.author | Chang, Hung-Tzu | - |
dc.contributor.author | Guggenmos, Alexander | - |
dc.contributor.author | Chen, Christopher T. | - |
dc.contributor.author | Oh, Juwon | - |
dc.contributor.author | Geneaux, Romain | - |
dc.contributor.author | Chuang, Yi-De | - |
dc.contributor.author | Schwartzberg, Adam M. | - |
dc.contributor.author | Aloni, Shaul | - |
dc.contributor.author | Neumark, Daniel M. | - |
dc.contributor.author | Leone, Stephen R. | - |
dc.date.accessioned | 2021-10-05T04:41:53Z | - |
dc.date.available | 2021-10-05T04:41:53Z | - |
dc.date.issued | 2021-08-23 | - |
dc.identifier.issn | 2469-9950 | - |
dc.identifier.issn | 2469-9969 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/19827 | - |
dc.description.abstract | Few-femtosecond extreme ultraviolet (XUV) transient absorption spectroscopy, performed with optical 500-1000-nm supercontinuum and broadband XUV pulses (30-50 eV), simultaneously probes dynamics of photoexcited carriers in WS2 at the W O-3 edge (37-45 eV) and carrier-induced modifications of core-exciton absorption at the W N-6,N-7 edge (32-37 eV). Access to continuous core-to-conduction-band absorption features and discrete core-exciton transitions in the same XUV spectral region in a semiconductor provides a means to investigate the effect of carrier excitation on core-exciton dynamics. The core-level transient absorption spectra, measured with either pulse arriving first to explore both core-level and valence carrier dynamics, reveal that coreexciton transitions are strongly influenced by the photoexcited carriers. A 1.2 +/- 0.3 ps hole-phonon relaxation time and a 3.1 +/- 0.4 ps carrier recombination time are extracted from the XUV transient absorption spectra from the core-to-conduction-band transitions at the W O-3 edge. Global fitting of the transient absorption signal at the W N-6,N-7 edge yields similar to 10 fs coherence lifetimes of core-exciton states and reveals that the photoexcited carriers, which alter the electronic screening and band filling, are the dominant contributor to the spectral modifications of core excitons and direct field-induced changes play a minor role. This work provides a first look at the modulations of core-exciton states by photoexcited carriers and advances our understanding of carrier dynamics in metal dichalcogenides. | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | AMER PHYSICAL SOC | - |
dc.title | Coupled valence carrier and core-exciton dynamics in WS2 probed by few-femtosecond extreme ultraviolet transient absorption spectroscopy | - |
dc.type | Article | - |
dc.publisher.location | 미국 | - |
dc.identifier.doi | 10.1103/PhysRevB.104.064309 | - |
dc.identifier.scopusid | 2-s2.0-85113721907 | - |
dc.identifier.wosid | 000688522900002 | - |
dc.identifier.bibliographicCitation | Physical Review B, v.104, no.6 | - |
dc.citation.title | Physical Review B | - |
dc.citation.volume | 104 | - |
dc.citation.number | 6 | - |
dc.type.docType | Article | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.relation.journalWebOfScienceCategory | Physics, Condensed Matter | - |
dc.subject.keywordPlus | PHOTOIONIZATION CONTINUUM | - |
dc.subject.keywordPlus | DIRECT-GAP | - |
dc.subject.keywordPlus | ELECTRON | - |
dc.subject.keywordPlus | SPECTRA | - |
dc.subject.keywordPlus | PHASE | - |
dc.subject.keywordPlus | NONLINEARITIES | - |
dc.subject.keywordPlus | RESONANCES | - |
dc.subject.keywordPlus | ACCURATE | - |
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