Pair-distribution function analysis of the structural valence transition in Cp{sub 2}{sup *}Yb(4,4'-Me{sub 2}-bipy)

Conference · Tue Jul 20 00:00:00 EDT 2010

OSTI ID:1051779

Booth, C H; Bauer, E D; Bozin, E S; Billinge, S J L; Walter, M D

The Cp{sup *}{sub 2} Yb(L) class of compounds, where Cp{sup *}=pentamethylcyclopentadienyl = C{sub 5}Me{sub 5} and L is either a 1,4-diazabutadiene or bipy = 2,2'bipyridine related ligand, have provided excellent analogies to the Kondo state on the nanoscale. Cp{sup *}{sub 2} Yb(4,4'-Me{sub 2}-bipy) furthers this analogy by demonstrating a valence transition as the sample is cooled below 200 K. Here, pair-distribution function (PDF) analysis of x-ray powder diffraction data demonstrate that the Cp{sup *}{sub 2}Yb(4,4'Me{sub 2}-bipy) molecule is virtually unchanged through the valence transition. However, the molecule’s stacking arrangement is altered through the valence transition.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: Chemical Sciences Division
• DOE Contract Number: DE-AC02-05CH11231
• OSTI ID: 1051779
• Report Number(s): LBNL-5162E
• Resource Relation: Conference: International Conference on Strongly Correlated Electron Systems (SCES 2010)
• Country of Publication: United States
• Language: English

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