Carrier Dynamics in a Series of Organic Magnetic Superconductors
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- 作者：Toshio Naito ; Saori Matsuo ; Tamotsu Inabe ; Yasunori Toda
- 刊名：The Journal of Physical Chemistry C
- 出版年：2012
- 出版时间：January 26, 2012
- 年：2012
- 卷：116
- 期：3
- 页码：2588-2593
- 全文大小：492K
- 年卷期：v.116,no.3(January 26, 2012)
- ISSN：1932-7455
文摘
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 魏- and 位-(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 位-type salts indicated that e-ph interaction should be characteristically strong in the 位-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 位- and the 魏-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.