Journal
MICROMACHINES
Volume 9, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/mi9020067
Keywords
single-molecule junction; current-voltage characteristics; atomic and electronic structure; vibrational mode; spin state
Categories
Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) [26102013, 16K13975]
- Tokuyama
- Kato
- Precise measurement technology
- Hitachi metals foundation
- research foundation for optscience and technology
- Grants-in-Aid for Scientific Research [17K19100, 26102013] Funding Source: KAKEN
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The relationship between the current through an electronic device and the voltage across its terminals is a current-voltage characteristic (I-V) that determine basic device performance. Currently, I-V measurement on a single-molecule scale can be performed using break junction technique, where a single molecule junction can be prepared by trapping a single molecule into a nanogap between metal electrodes. The single-molecule I-Vs provide not only the device performance, but also reflect information on energy dispersion of the electronic state and the electron-molecular vibration coupling in the junction. This mini review focuses on recent representative studies on I-Vs of the single molecule junctions that cover investigation on the single-molecule diode property, the molecular vibration, and the electronic structure as a form of transmission probability, and electronic density of states, including the spin state of the single-molecule junctions. In addition, thermoelectronic measurements based on I-Vs and identification of the charged carriers (i.e., electrons or holes) are presented. The analysis in the single-molecule I-Vs provides fundamental and essential information for a better understanding of the single-molecule science, and puts the single molecule junction to more practical use in molecular devices.
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