Optical Properties of c-Axis Oriented Superconducting MgB2 Films
J. J. Tu, G. L. Carr, V. Perebeinos, C. C. Homes, M. Strongin, P. B. Allen, W. N. Kang, Eun-Mi Choi, Hyeong-Jin Kim, Sung-Ik Lee
DOI 10.1103/PhysRevLett.87.277001 · Physical Review Letters
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Abstract
Temperature dependent optical conductivities and dc resistivity of c-axis oriented superconducting ( Tc=39.6K) MgB2 films ( ∼450nm) have been measured. The normal state ab-plane optical conductivities can be described by the Drude model with a temperature independent Drude plasma frequency of ωp,D=13600±100cm−1 or 1.68±0.01eV. The normal state resistivity is fitted by the Bloch-Grüneisen formula with an electron-phonon coupling constant λtr=0.13±0.02. The optical conductivity spectra below Tc of these films suggest that MgB2 is a multigap superconductor.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 39.6 | Pressure not reported | unknown |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 39.6 | Pressure not reported | unknown |
| Ba0.6K0.4BiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 33 | Pressure not reported | unknown |
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