Superfluid and normal-fluid density in the cuprate superconductors

D. B. Tanner; F. Gao; K. Kamarás; H. L. Liu; M. A. Quijada; D. B. Romero; Y. D. Yoon; A. Zibold; H. Berger; G. Margaritondo; L. Forró; R. J. Kelly; M. Onellion; G. Cao; J. E. Crow; O. Beom-Hoan; J. T. Markert; J. P. Rice; D. M. Ginsberg; T. Wolf

doi:10.1080/00150190108214979

Superfluid and normal-fluid density in the cuprate superconductors

D. B. Tanner, F. Gao, K. Kamarás, H. L. Liu, M. A. Quijada, D. B. Romero, Y. D. Yoon, A. Zibold, H. Berger, G. Margaritondo, L. Forró, R. J. Kelly, M. Onellion, G. Cao, J. E. Crow, O. Beom-Hoan, J. T. Markert, J. P. Rice, D. M. Ginsberg, T. Wolf

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

Abstract

As carriers are introduced into the cuprates (by doping the insulating "parent" compounds) spectral weight appears in the optical spectrum at photon energies below the charge-transfer gap. This spectral weight increases as the doping level increases. Magnetic penetration depth measurements have shown a good correlation between superfluid density and superconducting transition temperature in the underdoped-to-optimally-doped part of the phase diagram. Optical measurements allow independent determination of the total doping-induced spectral weight and the superfluid density. These measurements, made on cuprates with transition temperatures from 40 to 110 K, find that in optimally doped materials only about 20% of the doping-induced spectral weight joins the superfluid. The rest remains in finite-frequency, midinfrared absorption. In underdoped materials, the superfluid fraction is even smaller. This result implies extremely strong coupling for these superconductors.

Original language	English
Pages (from-to)	175-184
Number of pages	10
Journal	Ferroelectrics
Volume	249
Issue number	1-2
DOIs	https://doi.org/10.1080/00150190108214979
Publication status	Published - 2001 Jan
Externally published	Yes

Keywords

Infrared
Superconductivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1080/00150190108214979

Cite this

Tanner, D. B., Gao, F., Kamarás, K., Liu, H. L., Quijada, M. A., Romero, D. B., Yoon, Y. D., Zibold, A., Berger, H., Margaritondo, G., Forró, L., Kelly, R. J., Onellion, M., Cao, G., Crow, J. E., Beom-Hoan, O., Markert, J. T., Rice, J. P., Ginsberg, D. M., & Wolf, T. (2001). Superfluid and normal-fluid density in the cuprate superconductors. Ferroelectrics, 249(1-2), 175-184. https://doi.org/10.1080/00150190108214979

Tanner, DB, Gao, F, Kamarás, K, Liu, HL, Quijada, MA, Romero, DB, Yoon, YD, Zibold, A, Berger, H, Margaritondo, G, Forró, L, Kelly, RJ, Onellion, M, Cao, G, Crow, JE, Beom-Hoan, O, Markert, JT, Rice, JP, Ginsberg, DM & Wolf, T 2001, 'Superfluid and normal-fluid density in the cuprate superconductors', Ferroelectrics, vol. 249, no. 1-2, pp. 175-184. https://doi.org/10.1080/00150190108214979

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AU - Kamarás, K.

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AU - Quijada, M. A.

AU - Romero, D. B.

AU - Yoon, Y. D.

AU - Zibold, A.

AU - Berger, H.

AU - Margaritondo, G.

AU - Forró, L.

AU - Kelly, R. J.

AU - Onellion, M.

AU - Cao, G.

AU - Crow, J. E.

AU - Beom-Hoan, O.

AU - Markert, J. T.

AU - Rice, J. P.

AU - Ginsberg, D. M.

AU - Wolf, T.

PY - 2001/1

Y1 - 2001/1

N2 - As carriers are introduced into the cuprates (by doping the insulating "parent" compounds) spectral weight appears in the optical spectrum at photon energies below the charge-transfer gap. This spectral weight increases as the doping level increases. Magnetic penetration depth measurements have shown a good correlation between superfluid density and superconducting transition temperature in the underdoped-to-optimally-doped part of the phase diagram. Optical measurements allow independent determination of the total doping-induced spectral weight and the superfluid density. These measurements, made on cuprates with transition temperatures from 40 to 110 K, find that in optimally doped materials only about 20% of the doping-induced spectral weight joins the superfluid. The rest remains in finite-frequency, midinfrared absorption. In underdoped materials, the superfluid fraction is even smaller. This result implies extremely strong coupling for these superconductors.

AB - As carriers are introduced into the cuprates (by doping the insulating "parent" compounds) spectral weight appears in the optical spectrum at photon energies below the charge-transfer gap. This spectral weight increases as the doping level increases. Magnetic penetration depth measurements have shown a good correlation between superfluid density and superconducting transition temperature in the underdoped-to-optimally-doped part of the phase diagram. Optical measurements allow independent determination of the total doping-induced spectral weight and the superfluid density. These measurements, made on cuprates with transition temperatures from 40 to 110 K, find that in optimally doped materials only about 20% of the doping-induced spectral weight joins the superfluid. The rest remains in finite-frequency, midinfrared absorption. In underdoped materials, the superfluid fraction is even smaller. This result implies extremely strong coupling for these superconductors.

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Superfluid and normal-fluid density in the cuprate superconductors

Abstract

Keywords

ASJC Scopus subject areas

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