ICTS:29302

Video URL

van Hove singularity formation and interacting Hamiltonian for AV 3 Sb 5 (A=K, Rb, Cs)

van Hove singularity formation and interacting Hamiltonian for AV 3 Sb 5 (A=K, Rb, Cs)

(2024). van Hove singularity formation and interacting Hamiltonian for AV 3 Sb 5 (A=K, Rb, Cs). SciVideos. https://youtu.be/Uxum0Urbnao

van Hove singularity formation and interacting Hamiltonian for AV 3 Sb 5 (A=K, Rb, Cs). SciVideos, Aug. 14, 2024, https://youtu.be/Uxum0Urbnao 

          @misc{ scivideos_ICTS:29302,
            doi = {},
            url = {https://youtu.be/Uxum0Urbnao},
            author = {},
            keywords = {},
            language = {en},
            title = {van Hove singularity formation and interacting Hamiltonian for AV 3 Sb 5 (A=K, Rb, Cs)},
            publisher = {},
            year = {2024},
            month = {aug},
            note = {ICTS:29302 see, \url{https://scivideos.org/icts-tifr/29302}}
          }
Myung Joon Han
Talk numberICTS:29302
Source RepositoryICTS-TIFR
Source EventKagome off-scale
Collection

Abstract

In this talk, I will report our recent progress on Kagome superconductor AV3Sb5 (A=K, Rb, and Cs). As the first-step toward understanding of their largely unconventional natures, we conducted systematic analyses based on density functional theory calculation. Tight-binding parameters computed by maximally localized Wannier functions technique demonstrates that the out-of-plane Sb out -p orbital is a key element for the description of Van Hove singularity structures known in this material near Fermi level. Correlation strengths are also found to be largely determined by Sb out -p states. Based on constrained random phase approximation, we found that on- site and inter-site interaction parameter are both significantly affected by Sb out -p screenings. The chemical effect on the van Hove singularity structure and the possible suggestion of detecting time reversal symmetry breaking phase will be presented and discussed.