Extreme Ultraviolet Second Harmonic Generation Spectroscopy in a Polar Metal.

ABSTRACT: The coexistence of ferroelectricity and metallicity seems paradoxical, since the itinerant electrons in metals should screen the long-range dipole interactions necessary for dipole ordering. The recent discovery of the polar metal LiOsO₃ was therefore surprising [as discussed earlier in Y. Shi et al., Nat. Mater. 2013, 12, 1024]. It is thought that the coordination preferences of the Li play a key role in stabilizing the LiOsO₃ polar metal phase, but an investigation from the combined viewpoints of core-state specificity and symmetry has yet to be done. Here, we apply the novel technique of extreme ultraviolet second harmonic generation (XUV-SHG) and find a sensitivity to the broken inversion symmetry in the polar metal phase of LiOsO₃

SUBMITTER: Berger E 

PROVIDER: S-EPMC8323121 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature