Unusual angular dependence of the magnetoresistance in the LaVO₃-KTaO₃Rashba system

Condensed matter physics is opening new avenues for the realization of Dirac, Weyl, and Majorana fermions as quasi-particles which are to be observed in High energy physics. With this, KTaO₃ has emerged as the new kid in the spintronics block, showing the emergent phenomena in bulk and in heterostructures, interfaces, and thin films. In this, we have studied the angular dependence of the longitudinal and planar magnetoresistance at the conducting interface of LaVO₃-KTaO₃ having strong spin-orbit coupling strength and showing the existence of the Rashba effect. The system exhibited negative longitudinal magnetoresistance, planar Hall effect, and anisotropic magnetoresistance which are the signature of chiral anomaly which is also the signature of Dirac and Weyl semimetals. The observance of negative magnetoresistance for all in-plane angles is an unusual feature. These features of quantum origin arise from strong spin-orbit coupling and pave a path to engineering non-magnetic materials as sensors for vector magnetic fields.