Pair-distribution Function Analysis of the Structural Valence Transition in Cp∗2Yb(4,4′-Me2-bipy)

Journal Article · Thu Feb 24 00:00:00 EST 2011 · Journal of Physics: Conference Series

OSTI ID:1026768

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

The Cp*{sub 2}Yb(L) class of compounds, where Cp* = 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*{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*{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: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: DOE - OFFICE OF SCIENCE
• DOE Contract Number: DE-AC02-98CH10886
• OSTI ID: 1026768
• Report Number(s): BNL-95353-2011-JA; R&D Project: PO-011; KC0202010; TRN: US1105121
• Journal Information: Journal of Physics: Conference Series, Vol. 273; Conference: International Conference on Strongly Correlated Electron Systems; Sante Fe, New Mexico; 20100627 through 20100702
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DIFFRACTION
DISTRIBUTION FUNCTIONS
ELECTRONS
VALENCE
pair-distribution
structural valence transition
quantum-confined metallic band