paper

Interplay of electronic structure and unusual development in crystal structure of YbAuIn and YbAuGeIn

arXiv:1502.02000 · doi:10.1080/14786435.2015.1052859

Abstract

First-principles calculations within the DFT are employed to investigate the relationship between the electronic structure and the unexpected features of the hexagonal cell parameters of YbAuIn and YbAuGeIn. Calculations indicate that YbAuIn is an intermediate valent system with one Yb 4\textit{f} state pinned to the Fermi level, while YbAuGeIn is closer to integer valency with all Yb 4\textit{f} states occupied. Structural relaxations performed on LaAuIn and LuAuIn analogs reveal that expansion of the \textit{c}-parameter in YbAuGeIn is attributable to larger size of the divalent Yb compared with intermediate valent Yb.

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