Electron density distribution in Mn 4Si 7

T. Kajitani, K. Yubuta, T. Shishido, S. Okada

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Single crystal diffraction measurements were successfully carried out for spherical fine grains grown as single crystals of 0.05-0.2 mm in diameter. Local modulations in the silicon layers were also observed by means of high-resolution electron microscopy. The metallic tin-flux technique was used for crystal growth. The Fourier synthesis and maximum entropy method (MEM) were applied to x-ray diffraction data to obtain electron density distribution maps. Mn 4Si 7 is one of the most promising p-type thermoelectrics useable from 400 K to 700 K. The crystal structure is described in terms of a chimney-ladder structure. The doping effect, by which the system becomes n-type and a structure modulation occurs, was reported by our group previously. The resultant electron density maps were compared with those from the band calculation. The MEM calculation shows the displacement of silicon positions.

Original languageEnglish
Pages (from-to)1482-1487
Number of pages6
JournalJournal of Electronic Materials
Volume39
Issue number9
DOIs
Publication statusPublished - 2010 Sep

Keywords

  • Fourier synthesis
  • HREM
  • MEM
  • Mn Si
  • electron density
  • x-ray diffraction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Electron density distribution in Mn <sub>4</sub>Si <sub>7</sub>'. Together they form a unique fingerprint.

Cite this