(LaCrO3)m/SrCrO3 superlattices as transparent p-type semiconductors with finite magnetization

The electronic and magnetic properties of (LaCrO3)(m)/SrCrO3 superlattices are investigated using first principles calculations. We show that the magnetic moments in the two CrO2 layers sandwiching the SrO layer compensate each other for even m but give rise to a finite magnetization for odd m, which is explained by charge ordering with Cr3+ and Cr4+ ions arranged in a checkerboard pattern. The Cr4+ ions induce in-gap hole states at the interface, implying that the transparent superlattices are p-type semiconductors. The availability of transparent p-type semiconductors with finite magnetization enables the fabrication of transparent magnetic diodes and transistors, for example, with a multitude of potential technological applications.

Automated summary

The electronic and magnetic properties of (LaCrO3)(m)/SrCrO3 superlattices are investigated using first principles calculations. It is found that the magnetization in the superlattices is dependent on the value of m, due to charge ordering with different oxidation states of Cr ions. The transparent p-type semiconductors with finite magnetization can be used to fabricate transparent magnetic diodes and transistors with potential technological applications.