Magnon-driven quantum-dot heat engine
Département de Physique Théorique, Université de Genève - CH-1211 Genève 4, Switzerland
Received: 6 June 2012
Accepted: 4 July 2012
We investigate a heat to charge current converter consisting of a single-level quantum dot coupled to two ferromagnetic metals and one ferromagnetic insulator held at different temperatures. We demonstrate that this nanoengine can act as an optimal heat to spin-polarized charge current converter in an antiparallel geometry, while it acts as a heat to pure spin current converter in the parallel case. We discuss the maximal output power of the device and its efficiency.
PACS: 73.23.Hk – Coulomb blockade; single-electron tunneling / 72.25.-b – Spin polarized transport / 73.50.Lw – Thermoelectric effects
© EPLA, 2012