Demonstration of Resonant Enhancement of X-ray Scattering from CDW States
Abstract
Resonant scattering has the potential to determine the structure of charge density waves (CDWs) from a different aspect. Our calculation shows the peak profile reflects the phase correlation of the CDW modulation of the conduction band electron density. A demonstration experiment has been conducted studying the Q1 CDW state in NbSe_3. We see an enhancement of a factor 2 that looks like a resonant signal at the CDW satellite peak (0 -1.24 0) ∼ 25eV below the Nb K edge. As conventional Thomson scattering primarily measures the CDW modulation of the underlying lattice, resonant scattering allows us to study the electronic part directly. We will discuss the corresponding theory and its application to other systems with de-localized states. This work is supported by the NSF(DMR-0102677).
- Publication:
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APS March Meeting Abstracts
- Pub Date:
- March 2004
- Bibcode:
- 2004APS..MARB14001S