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Photoinduced phase separation with local structural ordering in organic molecular conductors

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Title: Photoinduced phase separation with local structural ordering in organic molecular conductors
Authors: Tsuchiya, S. Browse this author
Nakagawa, K. Browse this author
Yamada, J. Browse this author
Taniguchi, H. Browse this author
Toda, Y. Browse this author →KAKEN DB
Issue Date: 27-Oct-2017
Publisher: American Physical Society (APS)
Journal Title: Physical Review B
Volume: 96
Issue: 13
Start Page: 134311
Publisher DOI: 10.1103/PhysRevB.96.134311
Abstract: In this work, polarized pump-probe spectroscopy was carried out to investigate the effects of a structural ordering of molecules on photoinduced phase separation (PIPS) in the organic conductors k-(BEDT-TTF)(2)X [X = Cu[N(CN)(2)]Br (k-Br) and Cu(NCS)(2) (k-NCS)]. We found that the anisotropic response for the probe polarization appeared at around T-g, where the glasslike structural transition occurs. The anisotropy can be a result of a transient destruction of the local ordering of molecules, indicating a connection between the glasslike transition and PIPS. Moreover, we found that the PIPS response gradually develops with decreasing temperature in k-Br, whereas it steeply increases in k-NCS. This qualitative difference suggests that the structural ordering caused by a PIPS is more crucial in k-NCS than in k-Br.
Rights: ©2017 American Physical Society
Type: article
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)

Submitter: 土屋 聡

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