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DTSTAMP:20260417T003325Z
UID:https://www.mpsd.mpg.de/events/7577/42300
DTSTART:20161108T130000Z
DTEND:20161108T140000Z
CLASS:PUBLIC
CREATED:20161103T153247Z
DESCRIPTION:In this talk I will describe the evolution of our understanding
  on how to describe transport through strongly correlated systems in the f
 ramework of density functional theory (DFT).A first indication that DFT mi
 ght be useful to tackle this situation came with the realization that the 
 Kondo plateau in the zero-bias conductance may already be captured at the 
 level of standard Landauer theory combined with DFT. Later it has been sho
 wn how the description of Coulomb blockade in the zero-bias limit can be a
 chieved within DFT. In a more recent development we have proposed a DFT fo
 rmalism to describe electronic transport in the steady state which uses th
 e density on the junction and the steady current as basic variables. In a 
 finite window around zero bias\, a one-to-one map is established between t
 he basic variables and both local potential on as well as bias across the 
 junction. The resulting Kohn-Sham system features two exchange-correlation
  (xc) potentials\, a local xc potential and an xc contribution to the bias
 . For weakly coupled junctions the xc potentials exhibit steps in the dens
 ity-current plane which are shown to be crucial to describe the Coulomb bl
 ockade diamonds.Finally\, I will present a recent parametrization of the x
 c potentials for the single-impurity Anderson model which correctly incorp
 orates both the Kondo and Coulomb blockade regimes\, i.e.\, both zero and 
 finite temperature. This parametrization allows for calculation of current
 s and differential conductances at arbitrary bias and temperature at negli
 gible numerical cost but with the accuracy of sophisticated renormalizatio
 n group methods.\nVortragende(r): Stefan Kurth
LAST-MODIFIED:20161103T153247Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room I\, EG.076
ORGANIZER;CN=Angel Rubio:mailto:
SUMMARY:MPSD Seminar: Transport through strongly correlated systems describ
 ed by density functional theory
URL;VALUE=URI:https://www.mpsd.mpg.de/events/7577/42300
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