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Updated: May 22, 2026

Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures
Published on: February 8, 2018
Hydrogen-induced surface metallization of SrTiO3(001)
M D'Angelo1, R Yukawa, K Ozawa
1Institut des Nanosciences de Paris, Université Pierre et Marie Curie-Paris 6, CNRS-UMR 7588, Paris, France. dangelo@insp.jussieu.fr
Abstract:
Surface metallization of SrTiO3(001) by hydrogen adsorption is experimentally confirmed for the first time by photoemission spectroscopy and surface conductivity measurements. The metallic state is assigned to a quantized state in the space-charge layer induced by electron doping from hydrogen atoms. The measured two-dimensional (2D) conductivity is well above the 2D Ioffe-Regel limit indicating that the system is in a metallic conduction regime. The mean free path of the surface electron is estimated to be several nanometers at room temperature.
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