Optical absorption and transport in semiconducting SrTiO3

C. Lee, J. Destry, and J. L. Brebner
Phys. Rev. B 11, 2299 – Published 15 March 1975
PDFExport Citation

Abstract

The optical absorption of reduced and doped SrTiO3 has been measured between 0.39 and 7 μm. Transport measurements were also carried out between room temperature and 10 K for various samples with different treatment. Both optical and transport properties were found to depend greatly on the methods of preparations of the samples. We found up to five absorption peaks in the visible and infrared regions, lying at 0.43, 0.52, 0.70, 1.2, and ∼ 4.8 μm. In all samples, the so called free-carrier absorption tail starts falling off at about 2.5 μm and has a maximum between 4.5 and 5 μm. The position of this peak cannot be expalined by the free-carrier absorption theory of LO-mode scattering. The new absorption mechanisms are introduced in order to explain the results in this wavelength region. Of the five absorption peaks, the first, second, and fourth peaks are due to impurity or defect levels, whereas the third and fifth peaks are interpreted as being due either to interconduction-band or vacancy-level to conduction-band transitions. The conduction and scattering mechanisms are discussed.

  • Received 13 June 1974

DOI:https://doi.org/10.1103/PhysRevB.11.2299

©1975 American Physical Society

Authors & Affiliations

C. Lee, J. Destry*, and J. L. Brebner

  • Départment de Physique, Université de Montréal, Montréal, Québec, Canada

  • *Formerly J. Yahia.

References (Subscription Required)

Click to Expand
Issue

Vol. 11, Iss. 6 — 15 March 1975

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×