Select All
PIRSA:21040012

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

BibTex

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

Leon Balents University of California, Santa Barbara

Talk numberPIRSA:21040012
Source RepositoryPIRSA

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.