MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Thermoelectric Properties of a T-Shaped Quantum Dot with Relatively Strong On-Site Coulomb Interaction
Gaofeng JiXiansheng CaoGuoping Ru
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2014 Volume 55 Issue 6 Pages 861-865

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Abstract

The thermoelectric properties of a correlated T-shaped quantum dot system symmetrically coupled to two metallic leads are studied. This system is described by a generalized Anderson model and an approximation of correlation dynamics is employed to derive the corresponding Green’s functions. The properties are investigated by calculating the electrical conductance G, thermal conductance κ, thermopower S and figure of merit ZT for different gate voltages and temperatures. At last but not least, our numerical calculation results show that the thermoelectric properties of the T-shaped quantum dot with relatively strong on-site Coulomb interaction are mainly influenced by the bipolar effect, which is consistent with some theoretical and experimental results.

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© 2014 The Japan Institute of Metals and Materials
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