Momentum-Resolved Inelastic X-ray Scattering as a Novel Tool to Study Charge Gap in Complex Insulators

Details Momentum-Resolved Inelastic X-ray Scattering as a Novel Tool to Study Charge Gap in Complex Insulators Momentum-Resolved Inelastic X-ray Scattering as a Novel Tool to Study Charge Gap in Complex Insulators

2001-02-27

arxiv.org/abs/cond-mat/0102492v2

J. Elect. Spect. Relat. Phen. 114, 705 (2001).

Physics

Condensed Matter

Strongly Correlated Electrons

3 pages, 2 figures, Revised

Scientific paper

10.1016/S0921-4534(01)00769-9

We report particle-hole pair excitations in a cuprate insulator in the intermediate regimes of momentum-transfers using high energy inelastic x-ray scattering. The excitation spectra show dispersive features near the Mott edge which shed light on the momentum structure of the upper Hubbard band in cuprates. We briefly discuss the potential use of such a technique to study the momentum dependence of unoccupied bands and q-dependent charge fluctuations in complex insulators.

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