Supplementary Information for cond-mat/0610721: Potok et al. "Observation of the two-channel Kondo effect"

Details Supplementary Information for cond-mat/0610721: Potok et al. "Observation of the two-channel Kondo effect" Supplementary Information for cond-mat/0610721: Potok et al. "Observation of the two-channel Kondo effect"

2006-10-26

arxiv.org/abs/cond-mat/0610723v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

14 pages including 6 figures. Supplementary information for cond-mat/0610721

Scientific paper

This document provides detailed descriptions of data acquisition and data analysis in support of the accompanying Article, cond-mat/0610721: Observation of the two-channel Kondo effect. Some of the most intriguing problems in solid state physics arise when the motion of one electron dramatically affects the motion of surrounding electrons. Traditionally, such highly-correlated electron systems have been studied mainly in materials with complex transition metal chemistry. Over the past decade, researchers have learned to confine one or a few electrons within a nanoscale semiconductor "artificial atom", and to understand and control this simple system in exquisite detail. In the accompanying Article, we combine such individually well-understood components to create a novel highly-correlated electron system within a nano-engineered semiconductor structure. We tune the system in situ through a quantum phase transition between two distinct states, one familiar and one subtly new. The boundary between these states is a quantum critical point: the exotic and previously elusive two-channel Kondo state, in which electrons in two reservoirs are entangled through their interaction with a single localized spin.

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