Infrared properties of electron-doped cuprates: Tracking normal-state gaps and quantum critical behavior in Pr2-xCexCuO4

A. Zimmers; J. M. Tomczak; R. P.S.M. Lobo; N. Bontemps; C. P. Hill; M. C. Barr; Y. Dagan; R. L. Greene; A. J. Millis; C. C. Homes

doi:10.1209/epl/i2004-10480-2

Infrared properties of electron-doped cuprates: Tracking normal-state gaps and quantum critical behavior in Pr_2-xCe_xCuO₄

A. Zimmers^*, J. M. Tomczak, R. P.S.M. Lobo, N. Bontemps, C. P. Hill, M. C. Barr, Y. Dagan, R. L. Greene, A. J. Millis, C. C. Homes

^*Corresponding author for this work

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

Abstract

We report the temperature dependence of the infrared-visible conductivity of Pr_2-xCe_xCuO₄ thin films. When varying the doping from a non-superconducting film (x = 0.11) to a superconducting overdoped film (x = 0.17), we observe, up to optimal doping (x = 0.15), a partial gap opening. The magnitude of this gap extrapolates to zero for x - 0.17. A model combining a spin density wave gap and a frequency- and temperature-dependent self-energy reproduces our data reasonably well, suggesting the coexistence of magnetism and superconductivity in this material and the existence of a quantum critical point at this Ce concentration.

Original language	English
Pages (from-to)	225-231
Number of pages	7
Journal	Europhysics Letters
Volume	70
Issue number	2
DOIs	https://doi.org/10.1209/epl/i2004-10480-2
State	Published - Apr 2005
Externally published	Yes

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title = "Infrared properties of electron-doped cuprates: Tracking normal-state gaps and quantum critical behavior in Pr2-xCexCuO4",

abstract = "We report the temperature dependence of the infrared-visible conductivity of Pr2-xCexCuO4 thin films. When varying the doping from a non-superconducting film (x = 0.11) to a superconducting overdoped film (x = 0.17), we observe, up to optimal doping (x = 0.15), a partial gap opening. The magnitude of this gap extrapolates to zero for x - 0.17. A model combining a spin density wave gap and a frequency- and temperature-dependent self-energy reproduces our data reasonably well, suggesting the coexistence of magnetism and superconductivity in this material and the existence of a quantum critical point at this Ce concentration.",

author = "A. Zimmers and Tomczak, {J. M.} and Lobo, {R. P.S.M.} and N. Bontemps and Hill, {C. P.} and Barr, {M. C.} and Y. Dagan and Greene, {R. L.} and Millis, {A. J.} and Homes, {C. C.}",

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AU - Zimmers, A.

AU - Tomczak, J. M.

AU - Lobo, R. P.S.M.

AU - Bontemps, N.

AU - Hill, C. P.

AU - Barr, M. C.

AU - Dagan, Y.

AU - Greene, R. L.

AU - Millis, A. J.

AU - Homes, C. C.

PY - 2005/4

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AB - We report the temperature dependence of the infrared-visible conductivity of Pr2-xCexCuO4 thin films. When varying the doping from a non-superconducting film (x = 0.11) to a superconducting overdoped film (x = 0.17), we observe, up to optimal doping (x = 0.15), a partial gap opening. The magnitude of this gap extrapolates to zero for x - 0.17. A model combining a spin density wave gap and a frequency- and temperature-dependent self-energy reproduces our data reasonably well, suggesting the coexistence of magnetism and superconductivity in this material and the existence of a quantum critical point at this Ce concentration.

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Infrared properties of electron-doped cuprates: Tracking normal-state gaps and quantum critical behavior in Pr_2-xCe_xCuO₄

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