TY - JOUR
T1 - Crystalline surface phases of the liquid Au-Si eutectic alloy
AU - Shpyrko, Oleg G.
AU - Streitel, Reinhard
AU - Balagurusamy, Venkatachalapathy S.K.
AU - Grigoriev, Alexei Yu
AU - Deutsch, Moshe
AU - Ocko, Benjamin M.
AU - Meron, Mati
AU - Lin, Binhua
AU - Pershan, Peter S.
PY - 2007/12/28
Y1 - 2007/12/28
N2 - A two-dimensional crystalline layer is found at the surface of the liquid eutectic Au82 Si18 alloy above its melting point TM =359°C. Underlying this crystalline layer, we find a layered structure, 6-7 atomic layers thick. This surface layer undergoes a first-order solid-solid phase transition occurring at 371°C. The crystalline phase observed for T>371°C is stable up to at least 430°C. Grazing-incidence x-ray diffraction data at T>371°C imply lateral order comprising two coexisting phases of different oblique unit cells, in stark contrast with the single phase with a rectangular unit cell found for low-temperature crystalline phase, 359°C
AB - A two-dimensional crystalline layer is found at the surface of the liquid eutectic Au82 Si18 alloy above its melting point TM =359°C. Underlying this crystalline layer, we find a layered structure, 6-7 atomic layers thick. This surface layer undergoes a first-order solid-solid phase transition occurring at 371°C. The crystalline phase observed for T>371°C is stable up to at least 430°C. Grazing-incidence x-ray diffraction data at T>371°C imply lateral order comprising two coexisting phases of different oblique unit cells, in stark contrast with the single phase with a rectangular unit cell found for low-temperature crystalline phase, 359°C
UR - http://www.scopus.com/inward/record.url?scp=37649016200&partnerID=8YFLogxK
U2 - 10.1103/physrevb.76.245436
DO - 10.1103/physrevb.76.245436
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AN - SCOPUS:37649016200
SN - 1098-0121
VL - 76
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 24
M1 - 245436
ER -