defects and metallic contacts involving carbon nanotubes jisoon ihm school of physics, seoul...
Post on 21-Dec-2015
217 views
TRANSCRIPT
![Page 1: Defects and metallic contacts involving carbon nanotubes Jisoon Ihm School of Physics, Seoul National University, Korea](https://reader035.vdocuments.us/reader035/viewer/2022062516/56649d6b5503460f94a4ab43/html5/thumbnails/1.jpg)
Defects and metallic contacts involving carbon nanotubes
Jisoon Ihm
School of Physics, Seoul National University, Korea
![Page 2: Defects and metallic contacts involving carbon nanotubes Jisoon Ihm School of Physics, Seoul National University, Korea](https://reader035.vdocuments.us/reader035/viewer/2022062516/56649d6b5503460f94a4ab43/html5/thumbnails/2.jpg)
Effects of metallic contact on conductance of CNT
![Page 3: Defects and metallic contacts involving carbon nanotubes Jisoon Ihm School of Physics, Seoul National University, Korea](https://reader035.vdocuments.us/reader035/viewer/2022062516/56649d6b5503460f94a4ab43/html5/thumbnails/3.jpg)
(5,5) CNT with a Stone-Wales defect
(without metallic electrode)
![Page 4: Defects and metallic contacts involving carbon nanotubes Jisoon Ihm School of Physics, Seoul National University, Korea](https://reader035.vdocuments.us/reader035/viewer/2022062516/56649d6b5503460f94a4ab43/html5/thumbnails/4.jpg)
![Page 5: Defects and metallic contacts involving carbon nanotubes Jisoon Ihm School of Physics, Seoul National University, Korea](https://reader035.vdocuments.us/reader035/viewer/2022062516/56649d6b5503460f94a4ab43/html5/thumbnails/5.jpg)
Atomic model (Au cluster + (5,5) CNT with SW + Au cluster)
![Page 6: Defects and metallic contacts involving carbon nanotubes Jisoon Ihm School of Physics, Seoul National University, Korea](https://reader035.vdocuments.us/reader035/viewer/2022062516/56649d6b5503460f94a4ab43/html5/thumbnails/6.jpg)
Conductance plot with Vbias = 0.0 V
Fermi level = 0.0
For small voltage (≤ 0.1 V), ideal CNT : 1.0 G0
(effect of single gold contact: 3 KΩ),
CNT with SW : 0.93 G0
![Page 7: Defects and metallic contacts involving carbon nanotubes Jisoon Ihm School of Physics, Seoul National University, Korea](https://reader035.vdocuments.us/reader035/viewer/2022062516/56649d6b5503460f94a4ab43/html5/thumbnails/7.jpg)
Conductance plot with Vbias = 1.0 V
ideal CNT : 0.5 G0
(effect of single gold contact: 10 KΩ) CNT with SW : 0.49 G0
![Page 8: Defects and metallic contacts involving carbon nanotubes Jisoon Ihm School of Physics, Seoul National University, Korea](https://reader035.vdocuments.us/reader035/viewer/2022062516/56649d6b5503460f94a4ab43/html5/thumbnails/8.jpg)
Conductance plot with Vbias = 1.5 V
Energy (eV)
ideal CNT : 0.5 G0
(effect of single gold contact: 10 KΩ) CNT with SW : 0.49 G0
![Page 9: Defects and metallic contacts involving carbon nanotubes Jisoon Ihm School of Physics, Seoul National University, Korea](https://reader035.vdocuments.us/reader035/viewer/2022062516/56649d6b5503460f94a4ab43/html5/thumbnails/9.jpg)
Atomic model (Au cluster + (5,5) CNT with SW + Au cluster)
![Page 10: Defects and metallic contacts involving carbon nanotubes Jisoon Ihm School of Physics, Seoul National University, Korea](https://reader035.vdocuments.us/reader035/viewer/2022062516/56649d6b5503460f94a4ab43/html5/thumbnails/10.jpg)
broad gold electrode
narrow gold electrode
![Page 11: Defects and metallic contacts involving carbon nanotubes Jisoon Ihm School of Physics, Seoul National University, Korea](https://reader035.vdocuments.us/reader035/viewer/2022062516/56649d6b5503460f94a4ab43/html5/thumbnails/11.jpg)
Broad gold contact
For small voltage (≤ 0.1 V), ideal CNT : 1.6 G0
(effect of single gold contact: 0.83 KΩ) CNT with SW : 1.55 G0
For large voltage (~ 1 V),
ideal CNT : 0.7 G0 (effect of single gold contact: 6 KΩ) CNT with SW : 0.7 G0
Semiconducting CNT–Gold resistance : 15 KΩ (Ohmic contact) ( McEuen Group, PRL 92, 046401 (2004) )
![Page 12: Defects and metallic contacts involving carbon nanotubes Jisoon Ihm School of Physics, Seoul National University, Korea](https://reader035.vdocuments.us/reader035/viewer/2022062516/56649d6b5503460f94a4ab43/html5/thumbnails/12.jpg)
Summary of gold contact
• Gold contact gives additional resistance of ~ KΩ.
• Precise contact resistance is sensitive to the contact configuration.