Thermo-spin effects in quantum dots connected to ferromagnetic leads

Yonatan Dubi; Massimiliano di Ventra

Thermo-spin effects in quantum dots connected to ferromagnetic leads

Yonatan Dubi, Massimiliano di Ventra

Department of Chemistry

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-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 language	English
Title of host publication	American Physical Society, 2009 APS March Meeting, March 16-20, 2009
State	Published - 1 Mar 2009

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@inproceedings{f84364863dca4ace805bfdcf8294883d,

title = "Thermo-spin effects in quantum dots connected to ferromagnetic leads",

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.",

author = "Yonatan Dubi and {di Ventra}, Massimiliano",

year = "2009",

month = mar,

day = "1",

language = "English",

booktitle = "American Physical Society, 2009 APS March Meeting, March 16-20, 2009",

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TY - GEN

T1 - Thermo-spin effects in quantum dots connected to ferromagnetic leads

AU - Dubi, Yonatan

AU - di Ventra, Massimiliano

PY - 2009/3/1

Y1 - 2009/3/1

N2 - 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.

AB - 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.

M3 - Conference contribution

BT - American Physical Society, 2009 APS March Meeting, March 16-20, 2009

ER -

Thermo-spin effects in quantum dots connected to ferromagnetic leads

Abstract

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