Bipolar thermoelectric effect in a serially coupled quantum dot system

David M.T. Kuo, Yia Chung Chang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The Seebeck coefficient (S) of a serially coupled quantum dot (SCQD) junction system is theoretically studied via a two-level Anderson model. A change of sign in S with respect to temperature is found, which arises from the competition between tunneling currents due to electrons and holes (i.e., bipolar tunneling effect). The change of sign in S implies that one can vary the equilibrium temperature to produce thermoelectric current in either the forward or reverse direction, leading to a bipolar thermoelectric effect. For the case of two parallel SCQDs, we also observe the oscillatory behavior of S with respect to temperature.

Original languageEnglish
JournalJapanese Journal of Applied Physics
Volume50
Issue number10 PART 1
DOIs
StatePublished - Oct 2011

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