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Short‐ and Intermediate‐Range Atomic Structure of Glassy and Liquid As 2 Se 3 — An Anomalous X‐Ray Scattering Study
Author(s) -
Hosokawa S.,
Goldbach A.,
Boll M.,
Hensel F.
Publication year - 1999
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/(sici)1521-3951(199909)215:1<785::aid-pssb785>3.0.co;2-p
Subject(s) - scattering , short range order , anomalous scattering , structure factor , x ray , condensed matter physics , range (aeronautics) , crystal structure , crystallography , order (exchange) , materials science , physics , chemistry , optics , finance , economics , composite material
An anomalous X‐ray scattering experiment has been performed for glassy (g‐) and liquid (l‐) As 2 Se 3 in order to clarify the role of each constituent for the short‐ and intermediate‐range order (SRO and IRO). The differential structure factors Δ i S ( Q ) close to the As and Se K edges have been obtained from a detailed analysis. The first nearest‐neighbour distances around both As and Se are about 2.4 Å for both g‐ and l‐As 2 Se 3 , which would support the SRO model that g‐ and l‐As 2 Se 3 have an SRO similar to the corresponding crystal. The pre‐peak in S ( Q ) for g‐ and l‐As 2 Se 3 , is dominated by a partial structure factor S AsAs ( Q ), which reveals the existence of the As–As IRO with a correlation length of about 5.2 Å.