Kawasaki et al, at the University of Wisconsin, USA, have used a customised MANTIS M600 MBE tool to demonstrate the first epitaxial growth of LaAuSb single crystalline films to enable detailed structural and electronic measurements.
Kawasaki et al have demonstrated the growth of LaAuSb, which with a 19-electron count, has one more valence electron that most stable ABC intermatallics. Analysis has suggested that the electron count provides a new method for tuning layer buckling in ferroic ABCs, alongside convential epitaxial strain and chemical pressure.
STEM measurements of LaAuSb epitaxial film, revealed highly buckled planes of Au-Sb atoms, with strong interlayer Au-Au interactions and a doubling of the unit cell. This buckling is four times larger than the buckling observed in other ABCs with similar composition, e.g., LaAuGe and LaPtSb.
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