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JKMRS Volume 19, No 1, pp 11-17; Electron Spin Resonance Line-...
2015년 06월 20일 / 조회수: 647

Electron Spin Resonance Line-widths of Carbon Nanotubes based on the Hyperfine Interaction

 

 

Jung-Il Park1 and Hai-Du Cheong2*

 

 

1Nano-Physics and Technology Laboratory, Department of Physics, Kyungpook National University, Daegu 702-701, Korea

2 Division of Liberal Arts, Hanbat National University, Daejeon 305-719, Korea

 

 

 

 

Received Mar 13, 2015; Revised May 15, 2015; Accepted May 25, 2015

 


Abstract   The Kubo formalism and utilizing the projection operator technique (POT) introduced by Kawabata, the electron spin resonance (ESR) line-shape formula for carbon nanotubes through the hyperfine interaction introduced earlier in terms of POT. We can see that the line-width decreases exponentially as the temperature increases. The spin relaxation time show gradual decrease as magnetic field becomes larger. The analysis reveals the peculiarities in spin relaxation inherent to one dimensional system at low temperature and weak magnetic fields. Thus, the present technique is considered to be more convenient to explain the carbon nanotubes as in the case of other optical transitions.

 

Keywords Electron spin resonance, Projection operator technique, Carbon nanotubes, Line-widths

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