This title appears in the Scientific Report :
2004
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevB.70.094510 in citations.
Please use the identifier: http://hdl.handle.net/2128/1380 in citations.
Renormalization of the electron-phonon coupling in the one-band Hubbard model
Renormalization of the electron-phonon coupling in the one-band Hubbard model
We investigate the effect of electronic correlations on the coupling of electrons to Holstein phonons in the one-band Hubbard model. We calculate the static electron-phonon vertex within the linear response of Kotliar-Ruckenstein slave bosons in the paramagnetic saddle-point approximation. Within th...
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Personal Name(s): | Koch, E. |
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Zeyher, R. | |
Contributing Institute: |
Theorie I; IFF-TH-I |
Published in: | Physical Review B Physical review / B, 70 70 (2004 2004) 9 9, S. 094510 094510 |
Imprint: |
College Park, Md.
APS
2004
|
Physical Description: |
094510 |
DOI: |
10.1103/PhysRevB.70.094510 |
Document Type: |
Journal Article |
Research Program: |
Kondensierte Materie |
Series Title: |
Physical Review B
70 |
Subject (ZB): | |
Link: |
Get full text OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/1380 in citations.
We investigate the effect of electronic correlations on the coupling of electrons to Holstein phonons in the one-band Hubbard model. We calculate the static electron-phonon vertex within the linear response of Kotliar-Ruckenstein slave bosons in the paramagnetic saddle-point approximation. Within this approach the on-site Coulomb interaction U strongly suppresses the coupling to Holstein phonons at low temperatures. Moreover, the vertex function does not show particularly strong forward scattering. Going to larger temperatures kTsimilar tot we find that after an initial decrease with U, the electron-phonon coupling starts to increase with U, confirming a recent result of Cerruti, Cappelluti, and Pietronero. We show that this behavior is related to an unusual reentrant behavior from a phase separated to a paramagnetic state upon decreasing the temperature. |