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Document type:
Zeitschriftenaufsatz 
Author(s):
Latessa, L.; Pecchia, A.; Di Carlo, A.; Lugli, P. 
Title:
Negative quantum capacitance of gated carbon nanotubes 
Abstract:
Atomistic density functional theory (DFT) calculations of the capacitance between a metallic cylindric gate and a carbon nanotube (CNT) are reported. We find that the quantum capacitance of the CNT becomes negative as the CNT carrier density is reduced. This corresponds to an unconventionally high charge accumulation on the CNT, which in turn overscreens the external gate field. The relationship between this behavior and the predominance of the attractive exchange energy contribution is pointed...    »
 
Journal title:
Phys. Rev. B 72, 035455 
Year:
2005 
Year / month:
2005-07 
Quarter:
3. Quartal 
Month:
Jul 
Language:
en 
Publisher:
American Physical Society.