Single crystal studies and electronic structure investigation of a room-temperature semiconductor NaMnAs
arXiv:2109.03348 · doi:10.1103/PhysRevB.105.125204
Abstract
We report synthesis of single crystalline NaMnAs, confirm its antiferromagnetic order and characterise the sample by photoemission spectroscopy. The electronic structure was studied using optical transmittance, x-ray and ultraviolet spectroscopy and by theoretical modeling using local density approximation (LDA) extended to LDA+U when Heisenberg model parameters were determined. Optical transmittance measurement have confirmed the theoretical predictions that NaMnAs is a semiconductor. Also the Néel temperature was closer determined for the first time from temperature dependence of magnetization, in agreement with our Monte Carlo simulations.
arXiv comment11 pages, 11 figures
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