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HL: Fachverband Halbleiterphysik

HL 2: Focus Session: Exotic Charge Density Wave States of Matter: Correlations and Topology (joint session TT/HL)

Monday, September 27, 2021, 10:00–13:15, H7

The recent observation of charge density waves (CDW) in a variety of topological materials ranging from two-dimensional dichalcogenides, Weyl semimetals and metallic kagome systems has prompted intensive research on the origin and effects of such states. In these systems charge order forms the basis for correlated and topological states of quantum matter: Mott Hubbard correlations, tentative spin-liquid physics and chiral superconductivity in two-dimensional dichalcogenides, the emergence of axionic CDWs in Weyl semimetals and an interplay of Z2 topology, charge order and superconductivity in kagome metals. At the same time topology and electron correlations feed back on the CDW formation and dynamics. In this Focus Session we bring together theorists and experimentalists working in the field to discuss the interplay of charge order, correlations and topology in representative model systems, to identify major open challenges in our understanding of these systems and ultimately reach out for controlling CDW physics in correlated topological states of matter.
Organizers: Roser Valenti (Frankfurt University), Tim Wehling (Bremen University)

10:00 HL 2.1 Invited Talk: Electronic instabilities of kagomé metals and density waves in the AV3Sb5 materials — •Leon Balents
10:30 HL 2.2 Non-local electronic correlations in 1T-TaS2 out of equilibrium — •Uwe Bovensiepen
  11:00 15 min. break
  11:15 HL 2.3 The contribution has been withdrawn.
11:45 HL 2.4 Chiral superconductivity in the alternate stacking compound 4Hb-TaS2 — •Amit Kanigel
12:15 HL 2.5 Charge density waves and superconductivity in kagome metals — •Titus Neupert
12:45 HL 2.6 Controlling Emergent Behavior in Quantum Matter from a Theory Perspective — •Prineha Narang
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