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Temperature-induced abrupt volume inflation in the mixed-valence ternary Zintl phase Yb8Ge3Sb5

2005; Royal Society of Chemistry; Issue: 46 Linguagem: Inglês

10.1039/b511606f

1364-548X

Serena Margadonna, Kosmas Prassides, Maria Chondroudi, James R. Salvador, Mercouri G. Kanatzidis,

Thermodynamic and Structural Properties of Metals and Alloys

The Zintl phase, Yb8Ge3Sb5 exhibits a complex lattice response and an abrupt negative thermal expansion below 15 K – subtle structural changes before and after the transition are consistent with temperature-induced electron transfer from (to) Yb 4f bands to (from) Sb 5p and Ge 4p bands.