Pressure effects on magnetically driven electronic nematic states in iron pnictide superconductors
Jiangping Hu, Chandan Setty, Steve Kivelson
DOI 10.1103/PhysRevB.85.100507 · Physical Review B
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Abstract
In a magnetically driven electronic nematic state, an externally applied uniaxial strain rounds the nematic transition and increases the magnetic transition temperature. We study both effects in a simple classical model of the iron pnictides expressed in terms of local SO(N) spins (with N=3) which we solve to leading order in 1/N. The magnetic transition temperature is shown to increase linearly in response to an external strain while a sharp crossover, which is a remnant of the nematic transition, can only be identified for extremely small strain. We show that these results can reasonably account for recent neutron experimental data in BaFe2As2 by C. Dhital et al. [Phys. Rev. Lett. 108, 087001 (2012)].
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaFe2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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