T-square resistivity without Umklapp scattering in dilute metallic Bi₂O₂Se.

ABSTRACT: Fermi liquids (FLs) display a quadratic temperature (T) dependent resistivity. This can be caused by electron-electron (e-e) scattering in presence of inter-band or Umklapp scattering. However, dilute metallic SrTiO₃ was found to display T² resistivity in absence of either of the two mechanisms. The presence of soft phonons as possible scattering centers raised the suspicion that T² resistivity is not due to e-e scattering. Here, we present the case of Bi₂O₂Se, a layered semiconductor with hard phonons, which becomes a dilute metal with a small single-component Fermi surface upon doping. It displays T² resistivity well below the degeneracy temperature in absence of Umklapp and inter-band scattering. We observe a universal sc

SUBMITTER: Wang J 

PROVIDER: S-EPMC7395108 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature