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Effect of uniaxial pressure on the magnetostructural transitions of iron arsenide superconductors

A. Cano, I. Paul

DOI 10.1103/PhysRevB.85.155133 · Physical Review B

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Abstract

We study theoretically the variation of the magnetic and the structural transition temperatures of the iron arsenide superconductors with external uniaxial stress. We show that the increase of the transition temperatures reported in recent experiments is compatible with a simple magnetoelastic model in which the physical origin of this variation is linked to the fact that antiferromagnetic bonds are longer than the ferromagnetic ones in the magnetic phase. We make predictions that can be verified in order to test the relevance of this model.

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