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Title: Universal conductance fluctuations in electrolyte-gated SrTiO{sub 3} nanostructures

We report low-temperature magnetoconductance measurements of a patterned two-dimensional electron system at the surface of strontium titanate, gated by an ionic liquid electrolyte. We observe universal conductance fluctuations, a signature of phase-coherent transport in mesoscopic devices. From the universal conductance fluctuations, we extract an electron dephasing rate linear in temperature, characteristic of electron-electron interaction in a disordered conductor. The dephasing rate has a temperature-independent offset, which could possibly be explained by the presence of unscreened local magnetic moments in the sample.
Authors:
 [1] ; ; ;  [2]
  1. Department of Applied Physics, Stanford University, Stanford, California 94305 (United States)
  2. Department of Physics, Stanford University, Stanford, California 94305 (United States)
Publication Date:
OSTI Identifier:
22254023
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 21; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ELECTROLYTES; ELECTRON-ELECTRON COLLISIONS; ELECTRON-ELECTRON COUPLING; ELECTRON-ELECTRON INTERACTIONS; ELECTRONS; FLUCTUATIONS; LIQUIDS; MAGNETIC MOMENTS; NANOSTRUCTURES; STRONTIUM TITANATES