Probing the Fermi level of Y1-xPrxBa2Cu3O7-δ by femtosecond spectroscopy

A. S. Kazeroonian; T. K. Cheng; S. D. Brorson; Qi Li; E. P. Ippen; X. D. Wu; T. Venkatesan; S. Etemad; M. S. Dresselhaus; G. Dresselhaus

doi:10.1016/0038-1098(91)90260-3

Probing the Fermi level of Y_1-xPr_xBa₂Cu₃O_7-δ by femtosecond spectroscopy

A. S. Kazeroonian, T. K. Cheng, S. D. Brorson, Qi Li, E. P. Ippen, X. D. Wu, T. Venkatesan, S. Etemad, M. S. Dresselhaus, G. Dresselhaus

Physics

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45 Scopus citations

Abstract

Femtosecond spectroscopy at room temperature indicates a monotonic rise in the Fermi level E_F vs. Pr concentration x in Y_1-xPr_xBa₂Cu₃O_7-δ. For x=0.12±0.02, the Fermi level lies 2.0 eV below the unoccupied Cu d bands. The decrease in T_c with increasing x is consistent with a band filling model. The room temperature decay time τ of the transient reflectivity ΔR increases from τ<60 fs in superconducting YBa₂Cu₃O_7-δ to τ=140 fs in non-superconducting PrBa₂Cu₃O_7-δ. The effects of Pr substitution for Y on the position of the Fermi level are qualitatively similar to the effects of de-oxygenation on the E_F of YBa₂Cu₃O_7-δ.

Original language	English (US)
Pages (from-to)	95-98
Number of pages	4
Journal	Solid State Communications
Volume	78
Issue number	2
DOIs	https://doi.org/10.1016/0038-1098(91)90260-3
State	Published - Apr 1991

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/0038-1098(91)90260-3

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@article{18c061e1047549af91700703a1e8bbff,

title = "Probing the Fermi level of Y1-xPrxBa2Cu3O7-δ by femtosecond spectroscopy",

abstract = "Femtosecond spectroscopy at room temperature indicates a monotonic rise in the Fermi level EF vs. Pr concentration x in Y1-xPrxBa2Cu3O7-δ. For x=0.12±0.02, the Fermi level lies 2.0 eV below the unoccupied Cu d bands. The decrease in Tc with increasing x is consistent with a band filling model. The room temperature decay time τ of the transient reflectivity ΔR increases from τ<60 fs in superconducting YBa2Cu3O7-δ to τ=140 fs in non-superconducting PrBa2Cu3O7-δ. The effects of Pr substitution for Y on the position of the Fermi level are qualitatively similar to the effects of de-oxygenation on the EF of YBa2Cu3O7-δ.",

author = "Kazeroonian, {A. S.} and Cheng, {T. K.} and Brorson, {S. D.} and Qi Li and Ippen, {E. P.} and Wu, {X. D.} and T. Venkatesan and S. Etemad and Dresselhaus, {M. S.} and G. Dresselhaus",

year = "1991",

month = apr,

doi = "10.1016/0038-1098(91)90260-3",

language = "English (US)",

volume = "78",

pages = "95--98",

journal = "Solid State Communications",

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publisher = "Elsevier Ltd",

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TY - JOUR

T1 - Probing the Fermi level of Y1-xPrxBa2Cu3O7-δ by femtosecond spectroscopy

AU - Kazeroonian, A. S.

AU - Cheng, T. K.

AU - Brorson, S. D.

AU - Li, Qi

AU - Ippen, E. P.

AU - Wu, X. D.

AU - Venkatesan, T.

AU - Etemad, S.

AU - Dresselhaus, M. S.

AU - Dresselhaus, G.

PY - 1991/4

Y1 - 1991/4

N2 - Femtosecond spectroscopy at room temperature indicates a monotonic rise in the Fermi level EF vs. Pr concentration x in Y1-xPrxBa2Cu3O7-δ. For x=0.12±0.02, the Fermi level lies 2.0 eV below the unoccupied Cu d bands. The decrease in Tc with increasing x is consistent with a band filling model. The room temperature decay time τ of the transient reflectivity ΔR increases from τ<60 fs in superconducting YBa2Cu3O7-δ to τ=140 fs in non-superconducting PrBa2Cu3O7-δ. The effects of Pr substitution for Y on the position of the Fermi level are qualitatively similar to the effects of de-oxygenation on the EF of YBa2Cu3O7-δ.

AB - Femtosecond spectroscopy at room temperature indicates a monotonic rise in the Fermi level EF vs. Pr concentration x in Y1-xPrxBa2Cu3O7-δ. For x=0.12±0.02, the Fermi level lies 2.0 eV below the unoccupied Cu d bands. The decrease in Tc with increasing x is consistent with a band filling model. The room temperature decay time τ of the transient reflectivity ΔR increases from τ<60 fs in superconducting YBa2Cu3O7-δ to τ=140 fs in non-superconducting PrBa2Cu3O7-δ. The effects of Pr substitution for Y on the position of the Fermi level are qualitatively similar to the effects of de-oxygenation on the EF of YBa2Cu3O7-δ.

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Probing the Fermi level of Y_1-xPr_xBa₂Cu₃O_7-δ by femtosecond spectroscopy

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