Simple metal under tensile stress

dc.contributorAalto Universityen
dc.contributor.authorYin, Feng
dc.contributor.authorKulju, Sampo
dc.contributor.authorKoskinen, Pekka
dc.contributor.authorAkola, Jaakko
dc.contributor.authorPalmer, Richard E.
dc.contributor.departmentShaanxi Normal University
dc.contributor.departmentAalto University
dc.contributor.departmentUniversity of Jyväskylä
dc.contributor.departmentDepartment of Applied Physics
dc.contributor.departmentUniversity of Birmingham
dc.description.abstractWhile understanding the properties of materials under stress is fundamentally important, designing experiments to probe the effects of large tensile stress is difficult. Here tensile stress is created in thin films of potassium (up to 4 atomic layers) by epitaxial growth on a rigid support, graphite. We find that this "simple" metal shows a long-range, periodic "herringbone" reconstruction, observed in 2- and 3-(but not 1- and 4-) layer films by low-temperature scanning tunneling microscopy (STM). Such a pattern has never been observed in a simple metal. Density functional theory (DFT)simulations indicate that the reconstruction consists of self-aligned stripes of enhanced atom density formed to relieve the tensile strain. At the same time marked layer-dependent charging effects lead to substantial variation in the apparent STM layer heights.en
dc.description.versionPeer revieweden
dc.identifier.citationYin , F , Kulju , S , Koskinen , P , Akola , J & Palmer , R E 2015 , ' Simple metal under tensile stress : Layer-dependent herringbone reconstruction of thin potassium films on graphite ' , Scientific Reports , vol. 5 , 10165 , pp. 1-8 .
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dc.relation.ispartofseriesScientific Reportsen
dc.relation.ispartofseriesVolume 5en
dc.titleSimple metal under tensile stressen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi