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Updated: Jan 15, 2026

Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures
Published on: February 8, 2018
Electron-phonon interaction and localization of surface-state carriers in a metallic monolayer
Iwao Matsuda1, Canhua Liu, Toru Hirahara
1Department of Physics, School of Science, The University of Tokyo, 7-3-1 Hongo, Tokyo, Japan. imatsuda@issp.u-tokyo.ac.jp
Abstract:
Temperature-dependent electron transport in a metallic surface superstructure, Si(111)sqrt[3] x sqrt[3]-Ag, was studied by a micro-four-point probe method and photoemission spectroscopy. The surface-state conductivity exhibits a sharp transition from metallic conduction to strong localization at approximately 150 K. The metallic regime is due to electron-phonon interaction while the localization seemingly originates from coherency of electron waves. Random potential variations, caused by Friedel oscillations of surface electrons around defects, likely induce strong carrier localization.
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