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Pump- and Probe-polarization Analyses of Ultrafast Carrier Dynamics in Organic Superconductors

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Title: Pump- and Probe-polarization Analyses of Ultrafast Carrier Dynamics in Organic Superconductors
Authors: Nakagawa, K. Browse this author
Tsuchiya, S. Browse this author
Yamada, J. Browse this author
Toda, Y. Browse this author →KAKEN DB
Keywords: Time-resolved spectroscopy
Organic superconductor ET salts
Polarization dependence
Issue Date: Dec-2016
Publisher: Springer
Journal Title: Journal of superconductivity and novel magnetism
Volume: 29
Issue: 12
Start Page: 3065
End Page: 3069
Publisher DOI: 10.1007/s10948-016-3741-6
Abstract: We investigated photo-excited carrier relaxation dynamics in the strongly correlated organic superconductors kappa-(BEDT-TTF)(2)Cu(NCS)(2) and kappa-(BEDT-TTF)(2)Cu[N(CN)(2)]Br, using different polarizations of pump and probe pulses. Below the glasslike transition temperature (T (g)) anisotropic responses for probe polarization were observed in both compounds. Decomposing the data into anisotropic and isotropic components, we found the anisotropic component shows no pump polarization dependence, meaning that dissipative excitation process was dominant for the anisotropic carrier relaxation. This behavior indicates that the appearance of anisotropic responses can be associated with spatial symmetry breaking due to structural change of BEDT-TTF molecules.
Rights: The final publication is available at link.springer.com
Type: article (author version)
URI: http://hdl.handle.net/2115/67728
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: 中川 紘一

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