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Hokkaido University Collection of Scholarly and Academic Papers >
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Peer-reviewed Journal Articles, etc >
Ultrafast Carrier Dynamics in an Organic Superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br by Spectrally Resolved Pump-Probe Spectroscopy
| Title: | Ultrafast Carrier Dynamics in an Organic Superconductor kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br by Spectrally Resolved Pump-Probe Spectroscopy |
| Authors: | Tsuchiya, Satoshi Browse this author | | Mertelj, Tomaz Browse this author | | Mihailovic, Dragan Browse this author | | Yamada, Jun-ichi Browse this author | | Toda, Yasunori Browse this author →KAKEN DB |
| Keywords: | Organic superconductor | | Time-resolved spectroscopy | | Supercontinuum pulse |
| Issue Date: | Aug-2020 |
| Publisher: | Springer |
| Journal Title: | Journal of superconductivity and novel magnetism |
| Volume: | 33 |
| Issue: | 8 |
| Start Page: | 2299 |
| End Page: | 2303 |
| Publisher DOI: | 10.1007/s10948-019-05382-4 |
| Abstract: | 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. |
| Rights: | 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 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/82315 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 土屋 聡
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