Fig. 5: First principles calculations with the KKRnano code of Fe–Fe magnetic interactions in FeAs/InAs SLs with Fe disorders. | Nature Communications

Fig. 5: First principles calculations with the KKRnano code of Fe–Fe magnetic interactions in FeAs/InAs SLs with Fe disorders.

From: Ferromagnetism and giant magnetoresistance in zinc-blende FeAs monolayers embedded in semiconductor structures

Fig. 5

a, b FeAs/InAs SL structure (tInAs = 5 MLs) with disordered positions of Fe atoms at the octahedral interstitial site (Fei) and As site (FeAs), respectively. c, d Magnetic exchange interaction energy Jij between the Fe spins as a function of distance. Here the distance is expressed with a unit of a (= 0.307 nm), which is half of the lattice constant of InAs (in our calculations, we assume that the InAs layers have the same lattice constant as that of the AlSb buffer due to epitaxial strain effect). Positive (negative) values of Jij represent ferromagnetic (antiferromagnetic) coupling between a pair of Fe spins.

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