Anomalous behavior of the Fermi energy in heavily tin-doped InGaAs

A. Tsukernik, D. Cheskis, O. Potashnik, A. Palevski, S. Bar-Ad, S. Luryi, A. Cho

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3 Scopus citations


We have measured the dependence of the Fermi energy on carrier concentration in Sn doped InGaAs at 4.2 K and 300 K. At 4.2 K the Fermi energy was measured by photoluminescence spectroscopy, and at 300 K it was deduced from transport measurements of thermionic emission. In both cases the dependence of the Fermi energy on the mobile electron concentration, measured by Hall effect, strongly deviates from standard theoretical predictions, and the deviation increases with concentration. The most striking observed anomaly is the near saturation of the Fermi level when the Hall concentration exceeds 1019 cm-3.

Original languageEnglish
Pages (from-to)341-344
Number of pages4
JournalEuropean Physical Journal B
Issue number3
StatePublished - 1 Oct 2001
Externally publishedYes


  • 73.40.-c Electronic transport in interface structures
  • 73.40.Kp III-V semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions
  • 79.40.+z Thermionic emission


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