The first successful MBE growth of the antiferromagnetic material LiMnAs has been reported recently [1], opening one possible route to spintronics based on antiferromagnets. Although the ab-initio calculations predict the material to be a semiconductor, its detailed electronic structure still has not been fully experimentally explored. We present experimental study of the electronic and optical properties of LiMnAs by means of in situ optical reflectometry, cross sectional STM spectrocsopy, Auger spectroscopy and capacitance spectroscopy. Furthermore, we observed and analyzed the growth oscillations in the RHEED image at the early stages of the film growth. Combined with the SEM and XRD structural analysis this allowed us to identify coexistence of two closed phases of the material.

[1] T. Jungwirth, Phys. Rev. B 83, 035321 (2011)

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