Reversable heat flow through the carbon nanotube junctions

Abstract

Microscopic mechanisms of externally controlled reversable heat flow through the carbon nanotube junctions (NJ) are studied theoretically. Our model suggests that the heat is transfered along the tube section $\mathcal{T}$ by electrons ($e$) and holes ($h$) moving ballistically in either in parallel or in opposite directions and accelerated by the bias source-drain voltage $V_{\mathrm{SD}}$ (Peltier effect). We compute the Seebeck coefficient $\alpha$, electric $\sigma$ and thermal $\kappa$ conductivities and find that their magnitudes strongly depend on $V_{\mathrm{SD}}$ and $V_{\mathrm{G}}$. The sign reversal of $\alpha$ versus the sign of $V_{\mathrm{G}}$ formerly observed experimentally is interpreted in this work in terms of so-called chiral tunneling phenomena (Klein paradox).

References in corpus (4)

• Electric Field Effect in Atomically Thin Carbon Films
• Chiral tunneling and the Klein paradox in graphene
• Nonequilibrium Green's Function Approach to Phonon Transport in Defective Carbon Nanotubes
• Probing the intrinsic state of a one-dimensional quantum well with a photon-assisted tunneling

Cited by in corpus (3)

• Heat to Electricity Conversion by a Graphene Stripe with Heavy Chiral Fermions
• Electromagnetic properties of graphene junctions
• Quantized magneto-thermoelectric transport in low-dimensional junctions