Thermo-spin effects in quantum dots connected to ferromagnetic leads

Yonatan Dubi, Massimiliano di Ventra

Research output: Contribution to journalArticlepeer-review

Abstract

We study a system composed of a quantum dot in contact with ferromagnetic leads held at different temperatures, which we suggest can be used as a source of spin-voltage. Spin analogs to the thermopower and thermoelectric figure of merit are defined and studied as a function of junction parameters. It is shown that in contrast to bulk ferromagnets, the spin thermopower coeffcient in a junction can be as large as the Seebeck coefficient, resulting in a large spin figure of merit. In addition, it is demonstrated that the junction can be tuned to supply only spin current but no charge current. We also discuss experimental systems where our predictions can be verified.
Original languageEnglish
JournalAmerican Physical Society, 2009 APS March Meeting, March 16-20, 2009
StatePublished - 1 Mar 2009

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