Interaction enhanced thermopower in a Luttinger liquid
Abstract
The thermopower S_{L}(T) of a finite Luttinger liquid (LL) wire containing an impurity and connected to leads of noninteracting electrons is calculated. It is shown that at low temperatures k_{B}T<<Δ_{L}~=ħv_{F}/gL (L is the length of the wire, v_{F} is the Fermi velocity of the electrons, and g is the correlation parameter of the LL), S_{L}(T) is described by a Motttype formula. However, at higher temperatures, that is, when Δ_{L}<=k_{B}T<<ɛ_{F}, the expression for S_{L}(T) contains an interactiondependent factor. For strong interelectron interaction, the enhancement of the thermopower is large and it is much more pronounced for spinless electrons.
 Publication:

Physical Review B
 Pub Date:
 March 2001
 DOI:
 10.1103/PhysRevB.63.113101
 Bibcode:
 2001PhRvB..63k3101K
 Keywords:

 71.10.Pm;
 72.15.Jf;
 Fermions in reduced dimensions;
 Thermoelectric and thermomagnetic effects