Asymmetries in the electron-hole pair dynamics and strong Mott pseudogap effect in the phase diagram of cuprates

Details Asymmetries in the electron-hole pair dynamics and strong Mott pseudogap effect in the phase diagram of cuprates Asymmetries in the electron-hole pair dynamics and strong Mott pseudogap effect in the phase diagram of cuprates

2004-06-25

arxiv.org/abs/cond-mat/0406654v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 figs and 4+ pages

Scientific paper

Electron behavior in doped Mott systems continues to be a major unsolved problem in quantum many-electron physics. A central issue in understanding the universal Mott behavior in a variety of complex systems is to understand the nature of their electron-hole pair excitation modes. Using high resolution resonant inelastic x-ray scattering (RIXS) we resolve the momentum dependence of electron-hole pair excitations in two major classes of doped copper oxides which reveals a Mott pseudogap over the full Brillouin zone and over the entire phase diagram. The pair bandwidth and zone-boundary pair velocity renormalize on either sides of the phase diagram at very different rates indicating strong particle-hole doping asymmetries observed for the first time.

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