Author:
Makita Ryoko,Tanaka Kiyoaki,Ōnuki Yoshichika,Tatewaki Hiroshi
Abstract
The 4f states of Ce in a typical Kondo crystal, CeB6, are split into an excited state Γ7 and the ground state Γ8, with an excitation energy at 560 K. The electron-density distribution of the thermally excited state was measured at 430 K using a four-circle diffractometer equipped with a small furnace. In contrast to the previous results at lower temperature, electrons are transferred from B6 to Ce at 430 K. X-ray atomic-orbital analysis revealed that the 5d-Γ8 orbitals (the energy level of which is similar to that of the B-2p orbitals) are fully occupied and the 4f-Γ7 orbitals are more populated than the 4f-Γ8 orbitals. Fully occupied 5d-Γ8 makes the 4f-Γ8 states unstable and the energy levels of 4f-Γ7 and 4f-Γ8 are inverted.
Publisher
International Union of Crystallography (IUCr)
Subject
General Biochemistry, Genetics and Molecular Biology,General Medicine
Cited by
10 articles.
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