Influence of structural changes on diffusion in liquid germanium

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Chathoth SM, Damaschke B, Unruh T, Samwer K
Zeitschrift: Applied Physics Letters
Verlag: AMER INST PHYSICS
Jahr der Veröffentlichung: 2009
Band: 94
Heftnummer: 22
ISSN: 0003-6951


Abstract


Liquid germanium exhibits a change in the bonding character from being more covalent to more metallic while heating. We used quasielastic neutron scattering to measure the absolute value of self-diffusion coefficients in this liquid. Compared to other monoatomic liquids, such as liquid Ni or Ti, the self-diffusivity is an order faster near the melting temperature and shows a non-Arrhenius-like behavior. Above 1325 K, the activation energy for self-diffusion is low and obeys Stokes-Einstein relation. Even though the packing density of liquid germanium is less than that of simple metallic melts such as Pb or Sn, the temperature dependence of self-diffusivity does not exhibit D proportional to T(n)(n similar or equal to 2) form, which is observed for uncorrelated binary collisions of hard-spheres.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Unruh, Tobias Prof. Dr.
Professur für Nanomaterialcharakterisierung (Streumethoden)


Einrichtungen weiterer Autorinnen und Autoren

Georg-August-Universität Göttingen


Zitierweisen

APA:
Chathoth, S.M., Damaschke, B., Unruh, T., & Samwer, K. (2009). Influence of structural changes on diffusion in liquid germanium. Applied Physics Letters, 94(22). https://dx.doi.org/10.1063/1.3139753

MLA:
Chathoth, Suresh Mavila, et al. "Influence of structural changes on diffusion in liquid germanium." Applied Physics Letters 94.22 (2009).

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