Ultrafast Carrier Dynamics in an Organic Superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br by Spectrally Resolved Pump-Probe Spectroscopy

Tsuchiya, Satoshi; Mertelj, Tomaz; Mihailovic, Dragan; Yamada, Jun-ichi; Toda, Yasunori

Ultrafast Carrier Dynamics in an Organic Superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br by Spectrally Resolved Pump-Probe Spectroscopy

Tsuchiya, Satoshi; Mertelj, Tomaz; Mihailovic, Dragan et al.

Journal of superconductivity and novel magnetism, 2020, 33(8), 2299-2303

Permalink : https://hdl.handle.net/2115/82315

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アクセス権	open access
URI	https://hdl.handle.net/2115/82315
タイトル	Ultrafast Carrier Dynamics in an Organic Superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br by Spectrally Resolved Pump-Probe Spectroscopy
著者	Tsuchiya, Satoshi ; Mertelj, Tomaz ; Mihailovic, Dragan ; Yamada, Jun-ichi ; Toda, Yasunori
著者名 Tsuchiya, Satoshi
著者名 Mertelj, Tomaz
著者名 Mihailovic, Dragan
著者名 Yamada, Jun-ichi
e-Rad_Researcher 00313106 著者名 Toda, Yasunori
言語	英語
キーワード	Organic superconductor
	Time-resolved spectroscopy
	Supercontinuum pulse
発行日	2020-08
出版者	Springer
収録物名	Journal of superconductivity and novel magnetism
巻(号)	33(8)
ページ	2299-2303
抄録	In this work, spectrally resolved optical pump-probe measurements were carried out on strongly correlated organic superconductor.-(BEDT-TTF)2Cu[N(CN)2]Br. We find two different types of carrier relaxation dynamics, one of which appears at 1.82 eV and 1.94 eV, and another at 2.17 eV. The former is characterized by short decay time similar to 1-2 ps and appears below similar to 60 K. From the comparison with the previous studies, the dynamics arises from the photo-induced pseudogap (PG) formation of the partially appeared Mott phase. The latter has long relaxation time similar to 9 ps at 5 K and developed as temperature decreases below 30 K. The slow dynamics is consistent with appearance of superconducting (SC) gap. Such separate observation of PG and SC dynamics enables us to proceed further investigation of a relationship between them.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	This is a post-peer-review, pre-copyedit version of an article published in Journal of Superconductivity and Novel Magnetism. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10948-019-05382-4
PISSN	1557-1939
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1007/s10948-019-05382-4