Correspondence on "Controlling the Curie temperature in (Ga,Mn)As through location of the Fermi level within the impurity band" by M. Dobrowolska et al
K. W. Edmonds, B. L. Gallagher, M. Wang, A. W. Rushforth, O., Makarovsky, A. Patane, R. P. Campion, C. T. Foxon, V. Novak, and T. Jungwirth
TL;DR
This paper challenges the impurity band model for (Ga,Mn)As by providing experimental evidence that optimal Curie temperature and conductivity occur at low compensation, indicating a different mechanism for magnetic order.
Contribution
It presents experimental data that refutes the isolated impurity band scenario in (Ga,Mn)As, emphasizing the importance of low compensation for magnetic and electronic properties.
Findings
Maximized Curie temperature at low compensation
Conductivity peaks at low compensation
Contradicts the impurity band model for (Ga,Mn)As
Abstract
Comment on the recent Nature Materials article by M. Dobrowolska et al., arXiv:1203.1852. We present experimental data showing that the Curie temperature and conductivity of high quality (Ga,Mn)As samples are maximized at low compensation, and thus the magnetic order in (Ga,Mn)As is not consistent with the isolated impurity band scenario.
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Taxonomy
TopicsZnO doping and properties · Magnetic and transport properties of perovskites and related materials · Gas Sensing Nanomaterials and Sensors