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Carrier Dynamics in a Series of Organic Magnetic Superconductors

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Title: Carrier Dynamics in a Series of Organic Magnetic Superconductors
Authors: Naito, Toshio Browse this author
Matsuo, Saori Browse this author
Inabe, Tamotsu Browse this author
Toda, Yasunori Browse this author →KAKEN DB
Issue Date: 26-Jan-2012
Publisher: American Chemical Society
Journal Title: Journal of Physical Chemistry C
Volume: 116
Issue: 3
Start Page: 2588
End Page: 2593
Publisher DOI: 10.1021/jp210966u
Abstract: Understanding how electrons behave, i.e., carrier dynamics, in superconductors is indispensable for understanding the mechanism of superconductivity. Recently we have reported the carrier dynamics of κ- and λ-(BETS)2MCl4 (BETS = bis(ethylenedithio)tetraselenafulvalene, M = Ga, Fe) based on ultrafast spectroscopy, but the interpretation of the results remains an open question. In this paper we interpreted the results with the aid of newly measured magnetic susceptibility, X-ray single crystal structural analysis, and band calculation. Observation of coherent phonons only in the λ-type salts indicated that e-ph interaction should be characteristically strong in the λ-type salts. By comparison of the observed carrier dynamics with a two-temperature model, the temperature-dependence of carrier dynamics is consistently explained by the different strengths of the e-ph interaction between the λ- and the κ-type salts. The difference in strength of the e-ph interactions is related to their crystal structures. In conclusion, their carrier dynamics is consistently interpreted and classified by their crystal structures.
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: 戸田 泰則

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