BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Youjian Chen\, University of Virginia - Department of Physics\n \n
The  \;quantum  \;spin  \;Hall  \;insulator \, also  \;known  \;as  \;a  \;two-dimensional  \;(2D) topological  \;insulator\,  \;is  \;a  \;topological &nbs p\;state  \;of  \;matter  \;supporting  \;the  \;helic al edge \;states\, which are counter-propagating\, spin-momentum locke d 1D modes protected  \;by  \;time  \;reversal \; symmetry . It  \;exhibits  \;special  \;magneto-transport properties un der external magnetic field. In \;my talk\, I will construct modified Anderson impurity models to study the magneto-conductance of the \;qua ntum spin hall insulator. Firstly\, I will solve \;the transmission th rough single \;impurity on helical Luttinger liquid in the presence of magnetic field using Lippmann-Schwinger \;equation.  \;I will sho w the analytical expression for trans- mission and reflection coefficient in \;terms of the difference between energy of particle and the impuri ty level\, the hybridization \;coefficient and the magnetic field. The n\, I will show the effect of Coulomb interaction on helical \;Lutting er liquid at Hartree-Fock level. Using renormalization group\, I will deri ve the temperature dependence of conductance.  \;Lastly\, I will show the coherent transport of transmission \;through many impurities with different energy and hybridization coefficient in the presence of \;ma gnetic field.  \;I will compare my theoretical result with experiment.
\n DTSTART:20220421T193000Z LOCATION:Clark Hall\, Room G004 SUMMARY:Transport on an interacting helical edge with resonant impurities END:VEVENT END:VCALENDAR