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UID:DSC-22089
DTSTART;TZID=Europe/Berlin:20250625T140000
SEQUENCE:1750829914
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20250625T150000
URL:https://dresden-science-calendar.org/calendar/en/detail/22089
LOCATION:IFW\, Helmholtzstraße 2001069 Dresden
SUMMARY:Zhao: Quantum skyrmions on a Kondo-type lattice and a dynamical exc
 hange-correlation field formalism
CLASS:PUBLIC
DESCRIPTION:Speaker: Dr. Zhen Zhao\nInstitute of Speaker: Lund University /
  Sweden\nTopics:\n\n Location:\n  Name: IFW (https://zoom.us/j/98979924322
 ?pwd=m4S0HbV5FvbCJa3MNOSKTrA6wH52Sj.1\, ID: 989 7992 4322 / code: 795436)\
 n  Street: Helmholtzstraße 20\n  City: 01069 Dresden\n  Phone: \n  Fax: \
 nDescription: We present a quantum treatment for magnetic skyrmions in two
 -dimensional  itinerant magnets. The Kondo-type exchange between local qua
 ntum  spin-1/2 and non-interacting itinerant electrons is approximated in 
 the  mean-field level\, which decouples the spin and electron degrees of  
 freedom. Correspondingly\, different methods are implemented for the  loca
 l spins\, the isolated electrons\, and the electrons connected to  electri
 c leads. We show that the itinerant electrons are essential to  the ground
  state profiles\, as well as the dynamical properties of the  quantum spin
  textures. We extend a recently proposed  exchange-correlation field forma
 lism to spin Hamiltonians and impurity  problems. We apply the formalism t
 o a spin-1/2 chain with Heisenberg  interactions and the single-impurity A
 nderson model. Comparisons with  numerical benchmarks show that our approa
 ch yields one-particle spectral  functions with favorable accuracy at a re
 latively low computational  cost. .
DTSTAMP:20260418T132113Z
CREATED:20250624T053746Z
LAST-MODIFIED:20250625T053834Z
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