Current-induced insulator-metal transition and pattern formation in an organic charge-transfer complex
Current-induced insulator-metal transition and pattern formation in an organic charge-transfer complex
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DOI：
10.1126/science.284.5420.1645
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发表时间：
1999-06-04
期刊：
影响因子：
56.9
通讯作者：
Tokura, Y
中科院分区：
文献类型：
--
作者：
Kumai, R;Okimoto, Y;Tokura, Y
有机分子莫特绝缘体，其中载流子由于电子关联而局域化，在沿分子堆叠轴施加高电场时表现出非线性导电。电流驱动的 7,7,8,8-四氰基对醌二甲烷钾的低电阻状态稳定在 2 开尔文，此时用显微镜可以看到金属路径。电流引起沿着电流路径进入富载流子区域和贫载流子区域的条状周期性相分离。
Organic molecular Mott insulators, in which carriers are Localized as a result of the electron correlation, showed nonlinear electric conduction upon application of a high electric field along the molecular stacking axis. The current-driven low-resistive state of potassium 7,7,8,8-tetracyanoquinodimethanane was stabilized down to 2 kelvin, where a metallic path was visible with a microscope. The current flow caused a stripe-like periodic phase-segregation into the carrier-rich and carrier-poor regions along the current path.