Polaronic signatures in phonon isotopic shifts

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Description

The effect of O(16) by O(18) isotopic substitution in the excitation spectrum of a model electron-phonon Hamiltonian, previously used to describe the dynamics of the O(4)-Cu(1)-O(4) cluster in YBa{sub 2}Cu{sub 3}O{sub 7}, is presented. This model includes electronic correlations and electron-phonon interactions, exhibiting the presence of polaron tunneling. The calculated isotopic shifts of phonon excitations differ from those found using harmonic or anharmonic potentials, and are consistent results of optical measurements of c-axis phonons. The isotopic substitution changes the dynamics of polaron tunneling and produces a change in the local structure.

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7 p.

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Mustre de Leon, J.; Coss, R. de; Rubio-Ponce, A.; Bishop, A.R. & Trugman, S.A. December 31, 1998.

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Description

The effect of O(16) by O(18) isotopic substitution in the excitation spectrum of a model electron-phonon Hamiltonian, previously used to describe the dynamics of the O(4)-Cu(1)-O(4) cluster in YBa{sub 2}Cu{sub 3}O{sub 7}, is presented. This model includes electronic correlations and electron-phonon interactions, exhibiting the presence of polaron tunneling. The calculated isotopic shifts of phonon excitations differ from those found using harmonic or anharmonic potentials, and are consistent results of optical measurements of c-axis phonons. The isotopic substitution changes the dynamics of polaron tunneling and produces a change in the local structure.

Physical Description

7 p.

Notes

INIS; OSTI as DE99002545

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  • International conference on stripes and high T{sub c} superconductivity, Rome (Italy), 2-6 Jun 1998

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  • Other: DE99002545
  • Report No.: LA-UR--98-3803
  • Report No.: CONF-980684--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 348938
  • Archival Resource Key: ark:/67531/metadc685825

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  • December 31, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Feb. 26, 2016, 3:22 p.m.

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Mustre de Leon, J.; Coss, R. de; Rubio-Ponce, A.; Bishop, A.R. & Trugman, S.A. Polaronic signatures in phonon isotopic shifts, article, December 31, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc685825/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.