Eliashberg approach to infrared anomalies induced by the superconducting state of Ba(0.68)K(0.32)Fe(2)As(2) single crystals

A. Charnukha; O.V. Dolgov; Alexandre Avraamovitch Golubov; Y. Matiks; D.L. Sun; C.T. Lin; B. Keimer; A.V. Boris

doi:10.1103/PhysRevB.84.174511

Eliashberg approach to infrared anomalies induced by the superconducting state of Ba(0.68)K(0.32)Fe(2)As(2) single crystals

A. Charnukha, O.V. Dolgov, Alexandre Avraamovitch Golubov, Y. Matiks, D.L. Sun, C.T. Lin, B. Keimer, A.V. Boris

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

We report the full complex dielectric function of high-purity Ba0.68K0.32Fe2As2 single crystals with Tc=38.5K determined by wideband spectroscopic ellipsometry at temperatures 10≤T≤300K. We discuss the microscopic origin of superconductivity-induced infrared optical anomalies in the framework of a multiband Eliashberg theory with two distinct superconducting gap energies, 2ΔA≈6kBTc and 2ΔB≈2.2kBTc. The observed unusual suppression of the optical conductivity in the superconducting state at energies up to 14kBTc can be ascribed to spin-fluctuation–assisted processes in the clean limit of the strong-coupling regime.

Original language	Undefined
Article number	174511
Pages (from-to)	-
Number of pages	7
Journal	Physical review B: Condensed matter and materials physics
Volume	84
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.84.174511
Publication status	Published - 2011

Keywords

IR-104469
METIS-283379

Access to Document

10.1103/PhysRevB.84.174511

Cite this

Charnukha, A., Dolgov, O. V., Golubov, A. A., Matiks, Y., Sun, D. L., Lin, C. T., Keimer, B., & Boris, A. V. (2011). Eliashberg approach to infrared anomalies induced by the superconducting state of Ba(0.68)K(0.32)Fe(2)As(2) single crystals. Physical review B: Condensed matter and materials physics, 84(17), -. Article 174511. https://doi.org/10.1103/PhysRevB.84.174511

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abstract = "We report the full complex dielectric function of high-purity Ba0.68K0.32Fe2As2 single crystals with Tc=38.5K determined by wideband spectroscopic ellipsometry at temperatures 10≤T≤300K. We discuss the microscopic origin of superconductivity-induced infrared optical anomalies in the framework of a multiband Eliashberg theory with two distinct superconducting gap energies, 2ΔA≈6kBTc and 2ΔB≈2.2kBTc. The observed unusual suppression of the optical conductivity in the superconducting state at energies up to 14kBTc can be ascribed to spin-fluctuation–assisted processes in the clean limit of the strong-coupling regime.",

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Eliashberg approach to infrared anomalies induced by the superconducting state of Ba(0.68)K(0.32)Fe(2)As(2) single crystals. / Charnukha, A.; Dolgov, O.V.; Golubov, Alexandre Avraamovitch et al.
In: Physical review B: Condensed matter and materials physics, Vol. 84, No. 17, 174511, 2011, p. -.

Research output: Contribution to journal › Article › Academic › peer-review

TY - JOUR

T1 - Eliashberg approach to infrared anomalies induced by the superconducting state of Ba(0.68)K(0.32)Fe(2)As(2) single crystals

AU - Charnukha, A.

AU - Dolgov, O.V.

AU - Golubov, Alexandre Avraamovitch

AU - Matiks, Y.

AU - Sun, D.L.

AU - Lin, C.T.

AU - Keimer, B.

AU - Boris, A.V.

PY - 2011

Y1 - 2011

N2 - We report the full complex dielectric function of high-purity Ba0.68K0.32Fe2As2 single crystals with Tc=38.5K determined by wideband spectroscopic ellipsometry at temperatures 10≤T≤300K. We discuss the microscopic origin of superconductivity-induced infrared optical anomalies in the framework of a multiband Eliashberg theory with two distinct superconducting gap energies, 2ΔA≈6kBTc and 2ΔB≈2.2kBTc. The observed unusual suppression of the optical conductivity in the superconducting state at energies up to 14kBTc can be ascribed to spin-fluctuation–assisted processes in the clean limit of the strong-coupling regime.

AB - We report the full complex dielectric function of high-purity Ba0.68K0.32Fe2As2 single crystals with Tc=38.5K determined by wideband spectroscopic ellipsometry at temperatures 10≤T≤300K. We discuss the microscopic origin of superconductivity-induced infrared optical anomalies in the framework of a multiband Eliashberg theory with two distinct superconducting gap energies, 2ΔA≈6kBTc and 2ΔB≈2.2kBTc. The observed unusual suppression of the optical conductivity in the superconducting state at energies up to 14kBTc can be ascribed to spin-fluctuation–assisted processes in the clean limit of the strong-coupling regime.

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KW - METIS-283379

U2 - 10.1103/PhysRevB.84.174511

DO - 10.1103/PhysRevB.84.174511

M3 - Article

SN - 1098-0121

VL - 84

SP - -

JO - Physical review B: Condensed matter and materials physics

JF - Physical review B: Condensed matter and materials physics

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