Single-crystal studies and electronic structure investigation of the room-temperature semiconductor NaMnAs

• Autoři: VOLNÝ Jiří; CHARVÁTOVÁ Kateřina; VEIS Martin; HOLÝ Václav; VONDRÁČEK Martin; HONOLKA Jan; DUVERGER-NÉDELLEC Elen; SCHUSSER Jakub; SOUZA Sunil W.; MINÁR Jan; PIENTKA James M; MARMODORO Alberto; VÝBORNÝ Karel; UHLÍŘOVÁ Klára
• Rok publikování: 2022
• Druh: Článek v odborném periodiku
• Časopis / Zdroj: Physical Review B
• Fakulta / Pracoviště MU: Přírodovědecká fakulta

www

• https://arxiv.org/pdf/2109.03348.pdf
• https://doi.org/10.1103/PhysRevB.105.125204

• Doi: http://dx.doi.org/10.1103/PhysRevB.105.125204
• Klíčová slova: Antiferromagnetism; Crystal growth; Crystal structure; Density of states; Exchange interaction; Magnetic anisotropy; Magnetic semiconductors; Semiconductors
• Popis: Synthesis of single-crystalline NaMnAs is reported, and we confirm its high quality by x-ray photoemission spectra. Magnetometry results are consistent with previous findings of antiferromagnetic order. The electronic structure was further studied using optical transmittance and by theoretical modeling using local-density approximation (LDA) extended to LDA + U for the purpose of determining the Heisenberg model parameters. Optical transmittance measurements confirm theoretical predictions that NaMnAs is a semiconductor. The Néel temperature was determined from temperature dependence of susceptibility, in agreement with our Monte Carlo simulations.

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