期刊
PHYSICAL REVIEW B
卷 79, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.165102
关键词
charge-ordered states; electrical conductivity; narrow band gap semiconductors; organic semiconductors
资金
- 21st Century COE Program
- MEXT
- [16076213]
- [17340114]
We find a giant nonlinear conduction in the charge-ordered organic salt theta-(BEDT-TTF)(2)RbZn(SCN)(4) in a rapidly cooled state from 34 to 99 K, which cannot be ascribed to a simple Joule heating. The observed voltage-current characteristics are essentially identical to those of the related organic salt theta-(BEDT-TTF)(2)CsZn(SCN)(4), while the energy scale and the working temperatures are 1 order of magnitude higher. Considering that two kinds of charge-ordered domains coexist in this rapidly cooled state, we suggest that the inhomogeneity made of the two charge orders plays an essential role in the giant nonlinear conduction of the theta-type organic salts.
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