4.5 Article

Direct Observation of Vacancies and Local Thermal Vibration in Thermoelectric Rhenium Silicide

Journal

APPLIED PHYSICS EXPRESS
Volume 5, Issue 3, Pages -

Publisher

IOP PUBLISHING LTD
DOI: 10.1143/APEX.5.035203

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Funding

  1. Ministry of Education, Culture, Sports, Science and Culture and Technology, Japan (MEXT) [21246101]
  2. MEXT
  3. Grants-in-Aid for Scientific Research [21246101, 24656409, 23760665, 21360337] Funding Source: KAKEN

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The crystal structure of rhenium silicide with an anomalous ordered arrangement of vacancies has been investigated by utilizing spherical-aberration (C-s)-corrected scanning transmission electron microscopy (STEM). Using C-s-corrected STEM imaging, we directly observe for the first time ordered silicon vacancies in thermoelectric rhenium silicide accompanied by anomalously large local thermal vibration (rattling motion) of silicon atoms in their adjacent sites. (C) 2012 The Japan Society of Applied Physics

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