Kavli Affiliate: Cheng Peng
| First 5 Authors: Ta Tang, Brian Moritz, Cheng Peng, Z. X. Shen, Thomas P. Devereaux
| Summary:
The appearance of certain spectral features in one-dimensional (1D) cuprate
materials has been attributed to a strong, extended attractive coupling between
electrons. Here, using time-dependent density matrix renormalization group
methods on a Hubbard-extended Holstein model, we show that extended
electron-phonon ({it e-ph}) coupling presents an obvious choice to produce
such an attractive interaction that reproduces the observed spectral features
and doping dependence seen in angle-resolved photoemission experiments:
diminished $3k_F$ spectral weight, prominent spectral intensity of a
holon-folding branch, and the correct holon band width. While extended {it
e-ph} coupling does not qualitatively alter the ground state of the 1D system
compared to the Hubbard model, it quantitatively enhances the long-range
superconducting correlations and suppresses spin correlations. Such an extended
{it e-ph} interaction may be an important missing ingredient in describing the
physics of the structurally similar two-dimensional high-temperature
superconducting layered cuprates, which may tip the balance between intertwined
orders in favor of uniform $d$-wave superconductivity.
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