Isotopic Shifts in a Polaronic System

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The effect of isotopic substitution in a model polaronic system is presented. The authors use a three-site many body electron-phonon model which includes electronic correlations and electron-phonon interactions, showing the presence of polaron tunneling for intermediate and strong couplings. The isotopic substitution changes the dynamics of polaron tunneling. Additionally in the intermediate electron-phonon coupling regime, relevant for high-Tc superconductors, a change in the local structure is predicted. In this regime, the isotopic shift of phonon excitations is consistent with results of optical measurements of c-axis phonons in YBa{sub 2}Cu{sub 3}O{sub 7}.

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6 p.

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de Leon, J.M.; de Coss, R.; Rubia-Ponce, A.; Bishop, A.R. & Trugman, S.A. June 15, 1998.

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The effect of isotopic substitution in a model polaronic system is presented. The authors use a three-site many body electron-phonon model which includes electronic correlations and electron-phonon interactions, showing the presence of polaron tunneling for intermediate and strong couplings. The isotopic substitution changes the dynamics of polaron tunneling. Additionally in the intermediate electron-phonon coupling regime, relevant for high-Tc superconductors, a change in the local structure is predicted. In this regime, the isotopic shift of phonon excitations is consistent with results of optical measurements of c-axis phonons in YBa{sub 2}Cu{sub 3}O{sub 7}.

Physical Description

6 p.

Notes

INIS; OSTI as DE00759866

Medium: P; Size: 6 pages

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  • Polarons: Condensation, Pairing, Magnetism, Erice (IT), 06/15/1998--06/19/1998

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  • Report No.: LA-UR-98-4210
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 759866
  • Archival Resource Key: ark:/67531/metadc703900

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  • June 15, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • April 11, 2017, 2:35 p.m.

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de Leon, J.M.; de Coss, R.; Rubia-Ponce, A.; Bishop, A.R. & Trugman, S.A. Isotopic Shifts in a Polaronic System, article, June 15, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc703900/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.