Thin Film Electronics Group
Semiconductor Materials Field
We have been developing nanoelectronics based on atomically thin films combined with nanoscale fabrication technique.
Group Leader:Kazuhito Tsukagoshi
Conductance Switching in an Asymmetric Single-molecule Junction
Current Topics
A resistive switching using asymmetric molecule of C60 pyrrolidine trisaccharide (CPTA), which was spin-coated on the electrode, was proposed to demonstrate “single molecule switch”. As an operation scheme, combination of electro-migration and field-migration was employed to cyclically control the through-space between the CPTA and electrode surface, resulting in controlling tunneling current. Although the multiple CPTAs locate on the both side of the electrodes, only the CPTA on the cathode electrode can be activated for switching in applying bias voltage because of the work-function difference. This scheme automatically selects an active single CPTA molecule in the short distance position as switching element.
Nanogap electrodes constructed on a Si substrate using semiconductor lithography processes. Additionally, a schematic representation of the switching behavior of the fabricated device, illustrating the switch characteristics based on the molecular bridging state between the electrodes.
References
Group members
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Kazuhito Tsukagoshi
- Group Leader
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Seiichi Kato
- Senior Researcher
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Takashi Onaya
- Researcher
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Toshihide Nabatame
- Specially Appointed Researcher