Is the two dimensional organic conductor, τ-(EDO-S,S-DMEDT-TTF)2(AuCl2)1+y
clean or dirty? |
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| Authors: | T Nakanishi S Yasuzuka M Teramura L Li T Fujimoto T Sasaki T Konoike T Terashima S Uji Y Nogami G C Anyfantis G C Papavassiliou Keizo Murata |
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| Affiliation: | (1) Dep’t. of Mat. Sci., Grad. School of Sci., Osaka City Univ., 558-8585 Osaka, Japan;(2) Inst. for Mat. Res., Tohoku Univ., 980-8577 Sendai, Japan;(3) National Inst. for Mat. Sci., Tsukuba, 305-0003 Ibaraki, Japan;(4) Grad. School of Natural Science. & Tech., Okayama Univ., 700-8530 Okayama, Japan;(5) Theor. and Phys., Chem. Inst., National Hellenic Res. Found., 116/35 Athens, Greece |
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| Abstract: | The transport properties of organic τ-type conductors seem to be very clean as well as very dirty depending on what we observe.
To clarify this problem, we studied temperature and magnetic field dependence of resistivity, ρ(T, B), in τ-(EDO-S,S-DMEDT-TTF)2(AuCl2)1+y. The properties that favor “probably dirty” are: i) stepwise ρa(T) increase below 20 K, which is suppressed by magnetic field, and ii) contrasted difference in ρ(T) as well as magnetization
M(T) between field cooled (FC) and zero field cooled (ZFC). On the other hand, Shubnikov de Haas oscillations with very low
Dingle temperature (TD=1.5 K) are typical of clean system. Based on these observations, we conclude this system changes from “dirty” to “clean”
system by increase of magnetic field. |
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