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

Research output: Contribution to journalArticle

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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.

Original languageEnglish (US)
Pages (from-to)95-98
Number of pages4
JournalSolid State Communications
Volume78
Issue number2
DOIs
StatePublished - Jan 1 1991

Fingerprint

Fermi level
Spectroscopy
spectroscopy
deoxygenation
Oxygenation
room temperature
Substitution reactions
substitutes
reflectance
Temperature
decay
barium copper yttrium oxide

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

Cite this

Kazeroonian, A. S., Cheng, T. K., Brorson, S. D., Li, Q., Ippen, E. P., Wu, X. D., ... Dresselhaus, G. (1991). Probing the Fermi level of Y1-xPrxBa2Cu3O7-δ by femtosecond spectroscopy. Solid State Communications, 78(2), 95-98. https://doi.org/10.1016/0038-1098(91)90260-3
Kazeroonian, A. S. ; Cheng, T. K. ; Brorson, S. D. ; Li, Qi ; Ippen, E. P. ; Wu, X. D. ; Venkatesan, T. ; Etemad, S. ; Dresselhaus, M. S. ; Dresselhaus, G. / Probing the Fermi level of Y1-xPrxBa2Cu3O7-δ by femtosecond spectroscopy. In: Solid State Communications. 1991 ; Vol. 78, No. 2. pp. 95-98.
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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.",
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Kazeroonian, AS, Cheng, TK, Brorson, SD, Li, Q, Ippen, EP, Wu, XD, Venkatesan, T, Etemad, S, Dresselhaus, MS & Dresselhaus, G 1991, 'Probing the Fermi level of Y1-xPrxBa2Cu3O7-δ by femtosecond spectroscopy', Solid State Communications, vol. 78, no. 2, pp. 95-98. https://doi.org/10.1016/0038-1098(91)90260-3

Probing the Fermi level of Y1-xPrxBa2Cu3O7-δ by femtosecond spectroscopy. / Kazeroonian, A. S.; Cheng, T. K.; Brorson, S. D.; Li, Qi; Ippen, E. P.; Wu, X. D.; Venkatesan, T.; Etemad, S.; Dresselhaus, M. S.; Dresselhaus, G.

In: Solid State Communications, Vol. 78, No. 2, 01.01.1991, p. 95-98.

Research output: Contribution to journalArticle

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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 - 1991/1/1

Y1 - 1991/1/1

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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