%0 Journal Article
%A Andergassen, S.
%A Costi, T.A.
%A Zlatic, V.
%T Mechanism for large thermoelectric power in molecular quantum dots described by the negative-U Anderson model
%J Physical review / B
%V 84
%N 24
%@ 1098-0121
%C College Park, Md.
%I APS
%M PreJuSER-18530
%P 241107
%D 2011
%Z We acknowledge supercomputer support by the John von Neumann Institute for Computing (Julich), discussions with C. Karrasch and V. Meden (S. A.), and support by NSF Grant DMR-1006605, Forschungszentrum Julich, and the Ministry of Science, Croatia (V.Z.).
%X We investigate, with the aid of numerical renormalization group techniques, the thermoelectric properties of a molecular quantum dot described by the negative-U Anderson model. We show that the charge Kondo effect provides a mechanism for enhanced thermoelectric power via a correlation-induced asymmetry in the spectral function close to the Fermi level. We show that this effect results in a dramatic enhancement of the Kondo-induced peak in the thermopower of negative-U systems with Seebeck coefficients exceeding 50 mu V/K over a wide range of gate voltages.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000298115800002
%R 10.1103/PhysRevB.84.241107
%U https://juser.fz-juelich.de/record/18530