PIRSA:21040012

Electronic instabilities of kagomé metals and density waves in the AV3Sb5 materials

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}}
          }

Leon Balents

University of California, Santa Barbara

Talk number
PIRSA:21040012
Talk Type
Subject
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.