Observation of quantum oscillations near the Mott-Ioffe-Regel limit in CaAs₃.

ABSTRACT: The Mott-Ioffe-Regel limit sets the lower bound of the carrier mean free path for coherent quasiparticle transport. Metallicity beyond this limit is of great interest because it is often closely related to quantum criticality and unconventional superconductivity. Progress along this direction mainly focuses on the strange-metal behaviors originating from the evolution of the quasiparticle scattering rate, such as linear-in-temperature resistivity, while the quasiparticle coherence phenomena in this regime are much less explored due to the short mean free path at the diffusive bound. Here we report the observation of quantum oscillations from Landau quantization near the Mott-Ioffe-Regel limit in CaAs₃. Despite the insulator-like temperature dependence of resistivity, CaAs_3<

SUBMITTER: Wang Y 

PROVIDER: S-EPMC11660949 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature