PIRSA:21040012 Scientific Series Condensed Matter

DOI10.48660/21040012

Balents, L. (2021). Electronic instabilities of kagomé metals and density waves in the AV3Sb5 materials. Perimeter Institute. https://pirsa.org/21040012

Balents, Leon. Electronic instabilities of kagomé metals and density waves in the AV3Sb5 materials. Perimeter Institute, Apr. 26, 2021, https://pirsa.org/21040012 

@misc{ pirsa_PIRSA:21040012,
  doi = {10.48660/21040012},
  url = {https://pirsa.org/21040012},
  author = {Balents, Leon},
  keywords = {Condensed Matter},
  language = {en},
  title = {Electronic instabilities of kagom{\'e} metals and density waves in the AV3Sb5 materials},
  publisher = {Perimeter Institute},
  year = {2021},
  month = {apr},
  note = {PIRSA:21040012 see, \url{https://pirsa.org}}
}

Abstract

Recently, a new class of kagomé metals, with chemical formula AV3Sb5, where A = K, Rb, or Cs, have emerged as an exciting realization of quasi-2D correlated metals with hexagonal symmetry. These materials have been shown to display several electronic orders setting in through thermodynamic phase transitions: multi-component (“3Q”) hexagonal charge density wave (CDW) order below a Tc≈90K, andsuperconductivity with critical temperature of 2.5K or smaller, and some indications of nematicity and one-dimensional charge order in the normal and superconducting states. Other experiments show a strong anomalous Hall effect, suggesting possible topological physics.  I will discuss a theory of these phenomena based in part on strong interactions between electrons at saddle points, as well as ideas related to different competing density wave orders.

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