Transport spectroscopy for electronic bands in carbon-based nanomaterials with weak-bond contacts
2016.04.22 14:35
| 날짜 | 2016-04-26 16:00 |
|---|---|
| 연사 | |
| 장소 | #1323(1st Floor. E6-2) |
Transport spectroscopy for electronic bands in carbon-based nanomaterials with weak-bond contacts
April 26 (Tue), 4PM, #1323(1st Floor. E6-2)
Dr. Myung-Ho Bae, Korea Research Institute of Standards and Science
As a consequence of their unique electronic band structures, carbon-based nanomaterials (CNMs) such as carbon nanotubes and graphene exhibit intriguing quantum transports when incorporated into field-effect transistors (FETs) in which the contact resistance represents the coupling strength between the nanosystem and the bulk system. Here, we report a new aspect of CNM quantum devices that offers transport spectroscopy in the tunnelling regime of ~1 eV and directly reflects the electronic density of states. This was accomplished using physisorption contacts with the CNMs. Our first-principles calculations reveal that charge transfer is rare between the physisorption-contacted electrodes and CNMs. Therefore, the physisorption-contacted electrode forms a physisorption interface with a considerable vacuum gap and causes little disruption to the density of states of the CNM near the contact.
Contact: Chan-Ho Yang, Physics Dept., (chyang@kaist.ac.kr)
