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SUMMARY:JCMS: Controlling intraband topology through energy ordering
DTSTART:20261109T091500Z
DTEND:20261109T101500Z
DTSTAMP:20261107T063200Z
UID:indico-event-9865@indico.fysik.su.se
DESCRIPTION:Speakers: Hui Liu (Stockholm University)\n\nA band with zero C
 hern number can host energy-resolved topological fine structure. We show t
 hat this structure can be controlled within a single isolated band by rear
 ranging its Bloch-state energies alone\, without changing the underlying e
 igenstates. Using a two-orbital lattice model as a representative example\
 , we demonstrate that tuning scalar hopping changes the spectral localizer
  index inside the band while preserving its Berry curvature and keeping th
 e interband gap open\, leading to nontrivial chiral edge states within the
  band. Berry phases around closed constant-energy contours predict the res
 olved low-lying localizer levels and thus explain the presence of intraban
 d nontrivial chiral edge states. Our work connects Bloch-state geometry to
  the real-space spectral localizer\, providing a route toward engineering 
 topological boundary transport without requiring a nonzero band Chern numb
 er.\n\nhttps://indico.fysik.su.se/event/9865/
LOCATION:Albano 3: 6228 - Mega (22 seats) (Albano Building 3)
URL:https://indico.fysik.su.se/event/9865/
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