Optical properties of the iron-pnictide analog BaMn2As2
A. Antal, T. Knoblauch, Y. Singh, P. Gegenwart, D. Wu, M. Dressel
DOI 10.1103/PhysRevB.86.014506 · Physical Review B
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Abstract
We have investigated the infrared and Raman optical properties of BaMn2As2 in the ab plane and along the c axis. The most prominent features in the infrared spectra are the Eu and A2u phonon modes, which show clear transverse optical–longitudinal optical splitting from the energy loss function analysis. All the phonon features we observed in infrared and Raman spectra are consistent with the calculated values. Compared to the iron-pnictide analog AFe2As2, this compound is much more two dimensional in its electronic properties. For E∥c axis, the overall infrared reflectivity is insulatinglike. Within the ab plane, the material exhibits a semiconducting behavior. An energy gap 2Δ=48 meV can be clearly identified below room temperature.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaFeAsO0.9F0.1 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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