ICTS:29292

Video URL

Ultranodal states in multiband superconductors: Microscopic origins and experimental probes

Ultranodal states in multiband superconductors: Microscopic origins and experimental probes

(2024). Ultranodal states in multiband superconductors: Microscopic origins and experimental probes. SciVideos. https://youtu.be/E0PjpriYsQo

Ultranodal states in multiband superconductors: Microscopic origins and experimental probes. SciVideos, Aug. 11, 2024, https://youtu.be/E0PjpriYsQo 

          @misc{ scivideos_ICTS:29292,
            doi = {},
            url = {https://youtu.be/E0PjpriYsQo},
            author = {},
            keywords = {},
            language = {en},
            title = {Ultranodal states in multiband superconductors: Microscopic origins and experimental probes},
            publisher = {},
            year = {2024},
            month = {aug},
            note = {ICTS:29292 see, \url{https://scivideos.org/icts-tifr/29292}}
          }
Andreas Kreisel
Talk numberICTS:29292
Source RepositoryICTS-TIFR
Source EventKagome off-scale
Collection

Abstract

The ultranodal superconducting state exhibits very unusual physical properties since it has a strongly enhanced low energy density of states compared to a nodal state. This is due to the existence of a so-called Bogoliubov Fermi surface which is topologically protected and can emerge in a multiband system if a spin singlet pairing gap coexists with a nonunitary interband triplet component. Starting from a microscopic model, I will discuss how such a ultranodal state can be stabilized and examine signatures in the low temperature specific heat, tunneling spectroscopy and spin-relaxation rate pointing towards the existence of Bogoliubov Fermi surfaces. It turns out that FeSe doped with S seems to exhibit a number of these features and might be a strong candidate material to study consequences of Bogoliubov Fermi surfaces.