Abstract
We study the origin of the resonant X-ray scattering (RXS) signal near the Ce L III absorption edge in the antiferroquadrupolar (AFQ) ordering phase of CeB 6. In this rare-earth metal compound, the intra-atomic Coulomb interaction plays a dominant role to give the large RXS intensities, which shows a sharp contrast with the Jahn–Teller distortion mechanism realized in the transition metal compound such as LaMnO 3. The temperature and magnetic field dependences show good agreement with the recent experiment, indicating that the RXS signal is a direct reflection of the AFQ order parameter.
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