Surface depletion in doped SrTiO<sub>3</sub> thin films

A. Ohtomo; H. Y. Hwang

doi:10.1063/1.1668329

Publication Information

Title

Japanese:
English:	Surface depletion in doped SrTiO₃ thin films

Author

Japanese:	大友明, ファンハロルド.
English:	A. Ohtomo, H. Y. Hwang.

Language

English

Journal/Book name

Japanese:
English:	Applied Physics Letters

Volume, Number, Page

Vol. 84 No. 10 pp. 1716-1718

Published date

Mar. 2004

Publisher

Japanese:
English:

Conference name

Japanese:
English:

Conference site

Japanese:
English:

File

Official URL

<Go to ISI>://000189384900032

DOI

https://doi.org/10.1063/1.1668329

Abstract

Strong effects of surface depletion have been observed in metallic La-doped SrTiO3 thin films grown on SrTiO3 substrates by pulsed-laser deposition. The depletion layer grows with decreasing temperature due to the large temperature-dependent dielectric response of SrTiO3. When the depletion layer becomes comparable to or exceeds the thickness of the doped film, the Hall mobility shows significant enhancements as more of the electron distribution extends into the undoped substrate, in conceptual analogy to modulation doping in compound semiconductor heterostructures.

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