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arXiv · 1309.1494

Universal Conductance Fluctuations in Electrolyte-Gated SrTiO3 Nanostructures

Sam W. Stanwyck·P. Gallagher·J. R. Williams·David Goldhaber-Gordon
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Abstract

We report low-temperature magnetoconductance measurements of a patterned two-dimensional electron system (2DES) 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. Furthermore, the dephasing rate has a temperature-independent offset, suggestive of unscreened local magnetic moments in the sample.

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Sam W. Stanwyck, P. Gallagher, J. R. Williams, David Goldhaber-Gordon. 2013-09-05. Universal Conductance Fluctuations in Electrolyte-Gated SrTiO3 Nanostructures. https://doi.org/10.1063/1.4832555

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