Strain-induced spontaneous Hall effect in an epitaxial thin film of a Luttinger semimetal.

ABSTRACT: Pyrochlore iridates have provided a plethora of novel phenomena owing to the combination of topology and correlation. Among them, much attention has been paid to [Formula: see text], as it is known as a Luttinger semimetal characterized by quadratic band touching at the Brillouin zone center, suggesting that the topology of its electronic states can be tuned by a moderate lattice strain and external magnetic field. Here, we report that our epitaxial [Formula: see text] thin films grown by solid-state epitaxy exhibit a spontaneous Hall effect that persists up to 50 K without having spontaneous magnetization within our experimental accuracy. This indicates that the system breaks the time reversal symmetry at a temperature scale that is too high for the magnetism to be due to Pr 4f moments an

SUBMITTER: Ohtsuki T 

PROVIDER: S-EPMC6500155 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature