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Paper detail

Spin current pumping in helical Luttinger liquids

We study the DC spin current induced into an unbiased quantum spin Hall system through a two-point contacts setup with time dependent electron tunneling amplitudes. By means of two external gates, it is possible to drive a current with spin-preserving and spin-flipping contributions showing peculiar oscillations as a function of pumping frequency, electron-electron interaction and temperature. From its interference patterns as a function of the Fabry-Perot and Aharonov-Bohm phases, it is possible to extract information about the helical nature of the edge states and the intensity of the electron-electron interaction.

preprint2013arXivOpen access
Dario FerraroGiacomo DolcettoRoberta CitroFrancesco RomeoMaura Sassetti
cond-mat.mes-hall
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Dario FerraroGiacomo DolcettoRoberta CitroFrancesco RomeoMaura Sassetti

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