Journal Article

PUBDB-2021-00573

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Wave-Vector Dependence of the Dynamics in Supercooled Metallic Liquids

Ruta, B. (Corresponding author)Extern* ; Hechler, S.Extern* ; Neuber, N.Extern* ; Orsi, D. ; Cristofolini, L. ; Gross, O. ; Bochtler, B.Extern* ; Frey, M. ; Kuball, A.Extern* ; Riegler, S. S. ; Stolpe, M.Extern* ; Evenson, Z.Extern* ; Gutt, C.Extern*XFEL.EU* ; Westermeier, F.DESY* ; Busch, R. ; Gallino, I.Extern*

2020
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/PhysRevLett.125.055701  doi:10.3204/PUBDB-2021-00573

Abstract: We present a detailed investigation of the wave-vector dependence of collective atomic motion in Au$_{49}$Cu$_{26.9}$Si$_{16.3}$Ag$_{5.5}$Pd$_{2.3}$ and Pd$_{42.5}$Cu$_{27}$Ni$_{9.5}$P$_{21}$ supercooled liquids close to the glass transition temperature. Using x-ray photon correlation spectroscopy in a previously uncovered spatial range of only a few interatomic distances, we show that the microscopic structural relaxation process mimics the structure and presents a marked slowing down at the main average interparticle distance. This behavior is accompanied by dramatic changes in the shape of the intermediate scattering functions, which suggest the presence of large dynamical heterogeneities at length scales corresponding to a few particle diameters. A ballisticlike mechanism of particle motion seems to govern the structural relaxation of the two systems in the highly viscous phase, likely associated with hopping of caged particles in agreement with theoretical studies.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. Experimentebetreuung PETRA III (FS-PET-S)

Research Program(s):

1. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
2. 6G3 - PETRA III (POF3-622) (POF3-622)

Experiment(s):

1. PETRA Beamline P10 (PETRA III)

Appears in the scientific report 2020

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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