6533b833fe1ef96bd129c160
RESEARCH PRODUCT
Spin current pumping in helical Luttinger liquids
Francesco RomeoRoberta CitroMaura SassettiDario FerraroGiacomo Dolcettosubject
PhysicsTopological insulatorSpin polarizationCondensed matter physicsCondensed Matter - Mesoscale and Nanoscale PhysicsOscillationFOS: Physical sciences02 engineering and technologyElectron021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesElectronic Optical and Magnetic MaterialsTopological insulator; Spin currentQuantum spin Hall effectLuttinger liquidTopological insulatorSpin current0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)Spin Hall effectCondensed Matter::Strongly Correlated Electrons010306 general physics0210 nano-technologyQuantum tunnellingdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-01-01 |