In situ strain tuning of the metal-insulator-transition of Ca₂RuO₄ in angle-resolved photoemission experiments.

ABSTRACT: Pressure plays a key role in the study of quantum materials. Its application in angle resolved photoemission (ARPES) studies, however, has so far been limited. Here, we report the evolution of the k-space electronic structure of bulk Ca₂RuO₄, lightly doped with Pr, under uniaxial strain. Using ultrathin plate-like crystals, we achieve uniaxial strain levels up to -4.1%, sufficient to suppress the insulating Mott phase and access the previously unexplored electronic structure of the metallic state at low temperature. ARPES experiments performed while tuning the uniaxial strain reveal that metallicity emerges from a marked redistribution of charge within the Ru t_2g shell, accompanied by a sudden collapse of the spectral weight in the lower Hubbard band and th

SUBMITTER: Ricco S 

PROVIDER: S-EPMC6208396 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature