Volume 87, Number 5, September 2009
Article Number 57007
Number of page(s) 6
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 23 September 2009
EPL, 87 (2009) 57007
DOI: 10.1209/0295-5075/87/57007

Reversible heat flow through the carbon tube junction

S. E. Shafranjuk

Department of Physics and Astronomy, Northwestern University - Evanston, IL 60208, USA

received 27 April 2009; accepted in final form 17 August 2009; published September 2009
published online 23 September 2009

Microscopic mechanisms of the externally controlled reversible thermoelectric effect through the carbon tube junction (NJ) are examined theoretically. The theory interprets earlier experiments in terms of ballistic motion the phase-correlated electrons (e) and holes (h) along the tube section $\mathcal{T} $. We find that the direction and magnitude of the heat flow critically depend on the gate voltage $V_{{\rm G}}$ and on the source-drain voltage $V_{{\rm SD}}$, both. The voltages adjust the electron energy $\varepsilon $ to match the quantized state and van Hove singularities inside $\mathcal{T} $. Potential applications of the reversible Peltier effect are discussed.

73.23.Hk - Coulomb blockade; single-electron tunneling.
73.63.Kv - Quantum dots.
73.40.Gk - Tunneling.

© EPLA 2009