Hsuan-yeh Chang

Quantum Transport in Low Dimensional Electronic Systems Hsuan-yeh Chang

This work pertains to the spin and charge transportsin low dimensional electronic systems. The generalconcept of low dimensional physics is brieflyintroduced. We studied the spin transport of a spinpolarized Luttinger liquid in the presence of asingle impurity. We found that, by considering theextended Hubbard interaction, a spin-polarized wireis obtained in response to an external magneticfield. In addition, we studied the charge transportof a confined two-dimensional electron gas in thepresence of an insulating region. We considered thetwo-dimensional electron gas as being confined by aharmonic potential. The insulating region, whichcauses the electronic wave function to vanish, isreplaced by a static vortex. We found that arectified voltage is induced in response to a microwave.